Silicone Enhanced Contact Lenses - What You Need To Know

The last 12 years have been a revolution in terms of contact lens materials. Adding silicone has allowed for over a 500% increase in the amount of oxygen passing through the lens to the cornea. Well over half of all new contact lens fits today are using these new materials. There are a few things you should know about this new generation of lens materials.

Silicone enhanced contact lenses can cause problems. The material tends towards higher stiffness than normal contact lenses and has different characteristics. There has been an increase in giant papillary conjunctivitis with the increased use of silicone in lenses. The increased rigidity of the material interacting with the eyelid margins probably causes this reaction. The contacts start to stick under the upper eyelid and slide up with blinking. There are small bumps that develop under the upper eyelid that create discomfort. This is a non infectious process driven by an autoimmune response. Eye drops are often used to quell the inflammation, but it makes much more sense to use one of the older generation of materials. Giant papillary conjunctivitis was common in the early days of contact lenses when the same pair of lenses were worn for several years. As time went by the proteins, oils, and other components in the tears build up on the lenses over time. At some point, the deposits on the lenses elicit an autoimmune response and giant papillary conjunctivitis occurs. After the first wave of extended wear contact lenses surface in the 1980's we started to see another increase in giant papillary conjunctivitis. These lenses also developed more deposits since they were being left in overnight and not cleaned daily. There may be a common component in all of these lenses of low grade irritation under the upper eye lid.
Another issue with silicone enhanced contact lenses is an apparent reaction to the lens material. Patients tend to get red eyes that are uncomfortable. The eye has more of an allergic appearance. It is currently not clear what the true cause of this phenomenon is due to but switching to an older contact lens material seems to make it go away.
The Third problem with silicone enhanced contact lenses is an interaction between the lenses and the solutions used to store them overnight. Some studies have found surface tissue damage accompanies common contact lens solutions, If you are fit into silicone enhanced soft contact lenses you should have your optometrist recommend a specific solution. Silicone blend contact lenses have some intrinsic problems in wetting. You need to follow the directions for contact lens solutions your eye doctor gives you. The way solutions are used may also help achieve higher comfort levels. Rubbing and rinsing lenses immediately after removal allows the solutions to increase wetting of the lens when you take it out in the morning. Washing your hands prior to handling lenses decreases the amount of oil and contaminants that may interfere with proper wetting of the contact lens surface.
All contact lenses trap materials between the lens and the cornea on the surface of the eyes. Metabolic waste products, toxins generated from bacteria that live around the eye, and tear components can all get temporarily stuck under the lens.This is probably why we still see serious eye infections occasionally when people sleep in their contact lenses. While this situation is not much different from what occurs in a normal soft contact lens, it means you do not see all of the expected benefits from such an improved lens technology.
It's not all bad! That 500% plus increase in air that passes through the lens to the cornea prevents premature aging of the cornea cells. Unlike older style contact lenses, the cornea cells maintain the same size and shapes that are present in young, healthy cells. There is almost no significant swelling of the tissue overnight (older extended wear contact lenses double swelling of the cornea overnight).
Water beads up on silicone surfaces. Since you need water to spread out into a nice tear film for comfort, these lens have enhanced technology to improve wetting. The result has been lenses that generally wet better and have higher comfort levels than anything we have had in past years.

There are a few more things to work out with this new generation of soft contact lenses but they are wonderful addition for today's contact lens patients who spends hours on the computer and have active outdoor lifestyles. Just remember, like everything else, occasionally older is better!

If you live in Northern Colorado and are interested in what a Fort Collins Optometrist specialist can do to help with your contact lens needs give us a call. If your have dry eyes that are gritty,sandy, burning and disrupting your life we are the expert dry eye contact lens practice in Northern Colorado. Relief is on its way when you contact our patient centered office.

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Do I Need Prescription Lenses?

Lens are often an alternative to glasses and are a small curved piece of material, often glass or plastic, that sits directly over the cornea to correct vision. The lenses sit on top of the cornea (a tough material that can withstand this abrasion) and the moisture of the eye works as a lubricant sticking the lens to the eye. Blinking, or movement of the eyelid, moves the lens a little which provides moisture to cover the lens and removes any bacteria or other unwanted foreign bodies present. If you have perfect vision, the light rays enter the eye and meet on the retina at the same point. This does not happen in those who are long sighted (light rays do not meet) or short sighted (light rays meet too early) and a lens helps to focus the rays of light into the correct place to provide perfect vision. Prescription lenses have a different amount of curvature depending on the size of the prescription.

There are many different reasons why people choose to opt for contact lenses. There are some prescriptions that actually benefit from using these lenses and thus are medically possibly the best option. There are also social reasons for wearing contact lenses, including confidence as there can be negative connotations with wearing glasses. Another social factor is the colour, changing eye colour can change appearance in a large way and it is easy to get coloured prescription lenses that can change even dark eye colours.

Not everyone has only one vision problem in their eye and a worry of many is that with more than one, lenses are not an option. This is not the case and thanks to new technology there are lenses that can correct bifocal problems and other problems including Astigmatism and fall under the umbrella of Multi focal lenses which are lenses which correct more than one problem at once. Both come in soft and hard forms and have many different methods of action. Firstly, the lens can have one vision corrector at the top and the other at the bottom so the eye tilts between the two correcting vision. Or the lens can be made up with rings of power surrounding a prescription and these can vary depending on which type of contact lens is chosen. Finally aspheric lenses blend the two vision correctors together and the eye must learn to accommodate this.

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Understanding Eyeglasses and Lenses

The last time you visited your eye doctor, did he or she explain your prescription to you? What about the type of vision correction you need? Were you given any kind of suggestion for what kind of lenses would work best with your prescription or were you left with an optician to make those decision for you? Chances are good that you were left in the dark and this is not uncommon. Many eye doctors will check your vision, hand you a copy of your prescription, and send you off to go purchase eyeglasses with a sales agent. Understanding your prescription is the first step to understanding your eyeglasses and lenses and the following information will guide you to purchasing the best glasses for your vision.

The first thing to understand is your prescription. Take a look at the top section - do you see the abbreviations SPH, CYL, and Axis? In short, your SPH stands for sphere and it'll tell you what kind of distance correction you need. Your CYL stands for cylinder and this will tell you what kind of astigmatism correction you need - it works in conjunction with your Axis. If you don't see any numbers under the CYL or Axis, it means one or both of your eyes does not have astigmatism! Your sphere will contain a number with a plus (+) or minus (-) sign. The plus sign tells you that you need magnification to correct your vision while a minus sign tells you need help seeing afar. The numbers may be whole numbers like -2.00 or may contain quarter incremental numbers like +4.25. It's important to take a look at your prescription before you leave the doctor's office to fully understand the numbers and symbols of the prescription. If you choose to order glasses online, it'll help you in the ordering process.

Prescriptions with a plus sign will result in lenses that are thicker in the middle while prescriptions with a minus sign will have lenses that are thicker on the sides of the lens. Why is this important? It's good to know where the thickness will lie when picking out lenses. If you're opting for thinner lenses - your prescription will help indicate which high index lens would be best for you! If your prescription lies within the range of -2.00 to +2.00, you should be fine with the basic CR39 lens; a high index lens of 1.56 is typically 25 percent thinner than basic plastic lenses and can work with prescriptions ranging from -4.00 to +2.00; if your prescription ranges from -6.00 to +4.00, opt for the high index 1.61 lens that is 30-50 percent thinner than regular plastic lenses.

For high prescriptions like -8.00 to +4.00, high index 1.67 lenses are perfect but for prescriptions higher than this, like those that range -12.00 to +4.00, the thinnest lens you can get is 1.74 high index. It's important to remember that the higher your prescription in plus or minus, the thicker your lenses will be - even with high index lenses. The thinner your lenses are, the more important it is for you to get a UV protective coating.

Once you fully understand what kind of eye glasses you need for your vision, the easier it will be for you to choose a set of lenses. Remember to take your eyeglasses prescription with you when you leave your doctor's office and always ask questions before leaving!

Hillary Glaser is a social networking specialist and expert in cross-media promotion, currently working on promoting prescription eyeglasses. She is the Director of Marketing and Special Projects for GlassesUSA.com - the easiest way to buy glasses online, which now offers free shipping on all US orders with the code FreeShip10.

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Preventing Traffic Accidents With The Correct Contact Lenses

People who have had difficulty with their contacts know what an inconvenience it is finding the perfect lenses that provide clear vision and comfort. Having said that, finding correct fitting lenses that provide maximum comfort and near perfect vision can make all the difference between life and death, literally. People wear corrective lenses for a mixture of reasons. Most people wear them due to the impression it creates, job demands and participating in activities that are more enjoyable without glasses.

Sometimes, as people age, they need prescription lenses to correct their vision. The problem occurs when these same people drive without making certain they have the best fitting contact lenses available and more importantly ones that correct their sight. There are several potential problems that can arise from driving without the correct lenses for their vision impairment.

When people drive without having the proper prescription, their vision can become distorted in certain situations such as low light conditions or when the sun is low in the sky; obviously, this is not safe. When the driver cannot clearly see other vehicles, people or animals that could be in the road, they are putting themselves and others at risk. For people who have worn them for a while, these changes might sneak up on them and they may not even be aware that they need a new prescription. This clearly shows how important a regular check-up is.

There could be other problems apart from having the right prescription for you. As a new wearer of contacts, it is not uncommon for people to try different brands to try and find the brand that fits the most comfortably. Sometimes new wearers believe that as their eyes adjust to having a foreign object placed in their eye (the contact lens), their eyes will "settle down" and their vision will get clearer as they get used to wearing contacts. This might turn out to be true, but it can be dangerous to drive whilst waiting for your eyes to adjust to this new feeling. In the meantime, their eyes might feel extreme discomfort, which can be distracting to the driver, or their vision might be blurry. In either case, the driver is putting themselves and other drivers in danger.

Wearers can help make the road a safer place by making sure they have the best contacts available for them. They also need to go for regular checkups to ensure that they have the most up-to-date prescription needed. By taking these precautions, the road will remain a safer place.

Contact lenses are now also available in multi focal contact lenses, for people used to wearing multi focal glasses.

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The Beauty of Double Aspheric Lenses

Aspheric Lenses are Lenses which do not have the typical shape that the normal lenses have and thus allow less material to be required to make the lens, making the lens lighter and flatter. These will not improve the quality of sight, but instead maintain quality at a thinner, flatter lens shape. Double Aspheric Lenses are lenses which have the different shape on both sides of the lens instead of one just one side of the lens.

These lenses are still the same as other types of lenses however. They will still have different levels of index and can have many different treatments to make them more beneficial to the wearer. For example it is possible to add anti UV coating to name just one. Opticians will often see what is most beneficial for you as a wearer by asking many questions and seeing what is most suitable. Often certain professions, lifestyles or prescriptions will require specific adjustments to ensure that the eye is not being damaged or hurting itself. For example thicker fronted Aspheric Lenses are often recommended for those with strong Astigmatism who still require two Vision Corrections in one lens, i.e. Bi/Varifocal Lenses.

Aspheric Lenses have many advantages. Because the lens is able to be much thinner and flatter, the appearance of your eye through the glass can be much more attractive. Instead of a small distorted eye that can see with very thick glasses, your eyes can be much more normally views. Double Aspheric Lenses have even more advantages than just Aspheric. As the effect is on both sides of the lens, distortion to your eyes as they are viewed by everyone else is reduced even more. Your ability to see is also improved as you now have a much higher quality of vision with far less distortion as Double Aspheric Lenses have a very large focal point. Often, many people have found that these lenses are more durable and less easy to break when dropped or twisted.

This type of lens generally has the same problems as the High Index lens. Firstly, there is increased reflection off the surface of the lens and thus an Anti-Reflective coat must be applied which has the added benefit of making the eye itself look smaller. Secondly, the Abbe Number will be lower increasing colour blurring around an object but the extent of this is often negligible and depends on the wearer themselves.

If you wish to find out more on double aspheric lenses as well as information about Glasses Frames and Lenses please click on the link or go to our website.

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Advantages of Toric Lenses

Eye vision problems are quite common today, and so are usage of contact lenses to correct them, instead of the regular spectacles. Toric lenses are one such special kind of advanced lenses contact that have the ability to correct different vision problems at the same time and also come with many advantages. This articles discusses about all of them.

What are Toric Lenses

Toric contact lenses are soft lenses used to correct the eye condition called astigmatism. Astigmatism is an eye defect that hampers the ability of eye to focus an object into a clear image on the retina, leading to blurred vision. This happens because of irregular(Toric) curvature of the cornea or eye lens. The Toric Lenses are specially designed with two different curvatures to provide two different powers(called bi-focal contacts) that helps in correcting astigmatism eye, hyperopia(Farsightedness) or myopia(Shortsightedness) or both.

Advantages

- They can resolve both hyperopia and myopia problems at once, without the need of any eyeglasses.

- Toric lenses are sphero-cylindrical lenses having surfaces with two different radii of curvature in orthogonal planes, that fit the eyeball perfectly, retain their shape over the eye and go well with the natural behavoiur of eye. This is because, they are designed using PC(phosphorylcholine) Technology, phosphorylcholine is a natural material found in human cell membrane. They have a stabilized symmetrical behaviour, which makes it comfortable to wear them for long time, unlike the normal cheap lenses that can irritate eyes to cause infections and other troubles in the long run. Toric lenses also provide you excellent visual clarity.

- Major part of these lenses is water that maintains the natural moistness of the eye, avoiding the common problem of dryness because of using contact lenses.

- Sometimes, Astigmatism can effect only one eye, in this case, you can use a Toric lens for one eye and a regular spherical lens for other.

- Toric lenses come in different forms that you can use according to your needs and comforts, like frequent replacement lenses, disposable lenses, as well as extended wear that you can wear comfortable up to 30 days. They are available in variety of designs and materials to suit your style. Soft lenses, rigid and gas-permeable lenses are popularly used.

- You also have an option of changing your eye color while correcting astigmatism. These coloured lenses come in variety of natural colors that will enhance the hue of your eyes, adding to your facial beauty.

You can readily buy contact lenses online. There are many online stores and dealers that sell quality Toric contacts for less prices.

Tanmi Gold
Content and Copywriter.
Tanmi Services.

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Keratoconus and Hydrogel Contact Lenses

For people with Keratoconus contact lenses are often the best way to achieve vision correction. There are many different types of lenses and this article looks at the limitations of Hydrogel lenses for Keratoconus.

Keratoconus is a disease of the eye. The cornea, which is the front part of the eye, thins and becomes misshapen leading to the front of the eye developing an irregular 'cone' shape.

This bulging effect results in distortion of the light entering the eye causing blurring and ghosting of images.

While spectacles may produce some correction for early, or very mild, cases of Keratoconus, once the condition progresses beyond a certain point it becomes impossible to get reasonable correction with spectacles.

Contact lenses are often the next form of correction used, however there are many different types of contact lenses and some of them are more effective than others.

Hydrogel lenses are what are sometimes called 'soft' contact lenses.

Traditional Hydrogel lenses are very soft and flimsy and as such they fit very closely to the cornea of the eye.

This has the advantage of making them very comfortable to wear and this is, of course, one of the reasons they have become the most popular kind of lenses for normal vision correction.

However, this close fit makes them of very limited use in the treatment of Keratoconus.

Because they fit very closely, they form the same shape as the cornea. As it is this very shape of the cornea that is the basic cause of vision problems in someone with Keratoconus, the correction offered by these very soft and thin lenses is minimal.

If you imagine that a normal eye is rounded like a soccer ball and an eye with Keratoconus is shaped more like the end of a rugby ball. In order to correct vision the shape at the front of the eye needs to be made as close to the normal shape as possible.

A traditional Hydrogel lens is like laying a cloth over the end of the rugby ball. It moulds to the contours and the light coming into the eye is still distorted.

In the last few years there have been some advances in contact lens material technology. New materials have allowed the creation of contact lenses that are slightly thicker than traditional hydrogel lenses.

Although they retain much of the comfort of soft lenses they have more of a tendency to hold their own shape rather than just draping over the surface of the eye.

This means that they can be more effective for some cases of Keratoconus than has previously been possible with hydrogels. Having said that they are still of limited effect if the condition becomes more severe.

Next...

Find out more about Keratoconus, treatments and living with the condition at WHAT IS KERATOCONUS!

http://whatiskeratoconus.com/

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Contact Lenses Are Better Than Glasses for Children

Do your children need to use glasses? Are they annoyed at glasses? No problem, there is a nice alternative for them. Contact lenses are the alternative option for them because children are easily able to use these types of lenses instead of glasses like the adults.

There is no need to say that glasses are easy to use. But it is not a secret that children hate them because it is really a burden for them and not using glasses will help the children to feel more sociable. Besides contact lenses have some practical advantages. They are able to provide excellent peripheral and crisper focal vision. These lenses are also safe to play sports and all other physical exercises.

Most of the doctors usually prescribe contact lenses for the children not less than 11 years old. You may be astonished to learn that there is no minimum age to use this type of lenses. Age is not really an issue for this purpose. But you have to assess the responsibility level of your children. You have to understand that the child is able to follow the instructions of a doctor every day and to take care of his or her lenses properly.
Recent few studies show that children are often more responsible to take care of their lenses than adults. For the first few weeks parents will be responsible to supervise children, to confirm that they are following the instructions of doctors properly.

Many parents are concerned about the safety of wearing contact lenses for their children. No need to be worried. According to the experts if the lenses are worn on a particular schedule, they are completely safe for your children. If you think practically, contact lenses are safer than glasses. There is no chance of breaking them during playtime and to cause a major injury to the children.

Contact Lens Safety Tips:
Clean and store the lenses regularly according to the doctor's instruction.Make sure that the children are wearing lenses on a schedule.Don't sleep wearing contact lensesDon't forget to wear tight goggles while swimming with lensesIf the lenses feel uncomfortable in the eyes, instantly take the lenses out

Due to the physiology of human eye, it is impossible to lose a contact lens behind the eye. The worst that can happen is when lenses fold in half and try to hide under the eye lid. It is simply recommended to close the eyes and softly rub it through the eye lids from the edges toward the center. Ultimately the lenses will shift and it will be removed easily.

Nowadays all the contact lenses are designed for comfort. Children who wear high-quality lenses report that it generally feels like there is nothing in the eyes at all. It is the time to take the lenses out, by the end of the day, when the eyes feel a bit dry and this is natural feeling.

So finally, do you consider contact lenses as a solution for your children? Just give the lenses a try and observe what the children comment about it.

Angelina Neal is an investigative journalist who writes about many health related topics, including issues that have to do with optometry and contact lenses.

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Contact Lenses - Problems, Care, and Types

Contact lenses are magical pieces of plastic kept on the eyes that allow you to see without glasses. It may be used as a substitute for glasses in most of the cases, allowing you to dispense with them. Contact lenses may be used for cosmetic purposes to change the apparent color of your eyes or may also be used to treat certain eyes diseases.You have to consult an ophthalmologist or optometrist, or possibly an optician who will help you to have contact lens.The person who fits the lens must first decide if your eyes are healthy enough to wear the contact lenses or not. If you are fit to wear it then, fitter fits the correct lenses for your eyes and your needs and teaches you how to use and care for them.You should strictly follow the instructions given by the optician to take care of your contact lens because eyes are very sensitive part of your body.The most common reasons for contact-lens wearers to seek care is irritation of the eyes, redness, or blurred vision. These can be caused by the lenses wearing out or warping, a change in the eyes requiring new lenses, poor fitting of the lenses, poor care of the lenses, or sensitivity to solutions. These relatively minor inconveniences must be evaluated because they may signal the onset of corneal ulcers and deeper infection.There are different types of variety of contact lens are available in the market.They are:-

1.Soft Lenses:Soft contact lenses are those that allow oxygen to pass through to the cornea and are made up of soft, flexible plastics.Newer soft lens materials include silicone-hydro-gels to provide more oxygen to your eye while you wear your lenses.Soft contact lenses may be easier to adjust to and are more comfortable than rigid gas permeable lenses.

2.Rigid-Gas-Permeable(RGP):Rigid gas permeable contact lenses (RGP's) generally give a clearer, crisper vision and are more resistant and durable to deposit buildup.They are easier to handle and less likely to tear. However, they are not as comfortable initially as soft contacts and it may take a few weeks to get used to wearing RGP's, compared to several days for soft contacts. They tend to be less expensive over the life of the lens since they last longer than soft contact lenses.

3.Extended Wear Contact Lenses:Extended wear contact lenses are available for overnight wear ranging from one to six nights and then replaced every one to two weeks. Extended wear contact lenses are usually soft contact lenses. They allow oxygen to pass through to the cornea and are made of flexible plastics.Length of continuous wear depends on lens type and your eye care professional's evaluation of your tolerance for overnight wear.There are also a very few rigid gas permeable lenses that are designed and approved for overnight wear.

Freebeautyconsultant is a site where you can search topics related to the beauty.It also provides effective suggestion to your problems for skin care and beauty tips and related topics such as aromatherapy,cellulite treatment, Raynaude Disease etc.

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Glasses Frames and Varifocal Lenses

A common alternative to Bifocal Lenses is normally Varifocal Lenses or as they are also known, Progressive lenses. These are different to Bifocal Lenses because they provide a Gradient in prescription rather than two very different prescriptions side by side. They are generally set out in the same format as Bifocal with the highest Short Sightedness Prescription at the top of the lens, gradually decreasing until it reaches the highest Long Sighted Vision at the bottom of the lens. These are often offered in place of Bifocal Lenses.

There are many different advantages of this type of lens. Firstly, the wearer can choose the exact type of vision if they so choose by tilting their eye through a specific part of the lens. However, this is normally not needed as the prescriptions are placed where the wearer will need them the most and thus any manual focusing is much easier. Secondly, there is no "jumping "from images as there is a gradient of prescription rather than a sudden change as there is in Bifocal Lenses. As it is obvious on Bifocal Lenses where the two different prescriptions are, the Varifocal Lenses do not have this and thus do not carry any associated stigmatism with this image, making the wearer more confident in themself.

However, there can be some distortion or blurring due to the very nature of the glasses; this does vary however with different qualities of lens. This is effect is also worse when the prescriptions are higher, Clinicians have found that the wearer can get used to this effect and thus encourage that this lens type is started early and thus when eyes worsen in old age, the eye is already used to this effect. There can sometimes also be a problem in peripheral vision and thus for some workers it is recommended that an Occupational Progressive Lens is used instead, also known as an Office Lens or Extended Reading Lens. These are often more expensive as well than Bifocal Lenses.

These require very specific fitting to ensure that the viewer does not have narrow vision and will not to always be tilting their head to see clearly. When at the opticians, the Clinician will spend much time measuring you for fitting and will ask a large range of questions to ensure that you are getting the best for your eyes. This is because different lenses have different prescriptions, heights or even prices.

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Turn Heads With Costume Contact Lenses

Costume or theatrical contact lenses have always been a popular eye device for costume designers that design costumes for movies and the theatre. You may remember the realistic look of a person turning into a werewolf. Those menacing eyes are the result of costume contact lenses. However, it is not just costume designers that using these specialty contacts. Now anyone can get these contact lenses for their own use, whether it is for Halloween or a special event. Costume contact lenses will definitely turn heads.

The use of costume contacts are best left to the imagination. Many wear these lenses for Halloween, but many will wear them when they go out to trendy dance clubs. These contacts will make the eyes stand out. There are many different types of costume lenses on the market. You can get such popular brands as Cooper Vision, Crazy Lenses, Crazy lenses, Untamed Eyes by CibaVision, WildEyes, Cat Eyes, and more. You can get many different types of prints and other exciting lens designs. Not only are these contacts cool and attention catching, they are comfortable to wear when you take care of them. These lenses are also very affordable when you know where to get them at discounted prices.

The best source to get a wide variety of costume contact lenses is online. There are affordable costume contact lenses in just about every type when you shop at an online contact lens retailer. The best thing about getting contact lenses online is the price. You can get cheap contact lenses online from a reputable contact lens retailer and the selection is extensive so you can get a couple of pair. When you buy costume contact lenses it is important to remember that they are a device you are putting in your eyes. You have to take care of them so you do not damage your eyes or get red and runny eyes. Make sure you get the contacts from an established and reputable online contact lens retailer so you know you are getting quality costume contacts. Basically, you must follow the proper instructions on wearing and caring for them. Also don't swap them with others as you can get an infection.

Another benefit of getting costume contact lenses is you can get them with or without a prescription. Although the costume contact lens is opaque, the center is clear so you can see without any problems. Make sure you see your optician about getting the right fitting for the lenses so that you make sure you get the contacts that fits your eyes properly.

When you buy brand name custom contacts and take care of them as instructed, they will be safe. You will also benefit from the cheap price when your purchase them from an online contact lens retailer. Clean them properly, handle them with clean hands, wear them for the time instructed, order them from a reputable online retailer, and make sure you get an eye exam to make sure your eyes are healthy. Basically, treat the contacts just like you would treat any other type of Acuvue contact lens.

Find the right Acuvue for you. Get designer brands, styles and colours that suit you, at discount prices.

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Glare From Eyeglass Lenses?

Ever noticed glare or reflection from someone's eyeglass lens? The person wearing these glasses and lenses may not realize it, but 8% of light that hits a person's glasses induces annoying reflections and glare. This reflection and glare causes not only vision disturbance but also reduction in the person's vision.

Today there are special coatings that can be been applied to eyeglass lenses that virtually eliminate all reflection and glare. This is especially important with indoor lighting, streetlights, headlights, television and computer screens. With computer vision syndrome being so prominent and common, the need to eliminate glare on lenses is essential for eyewear when it comes to looking at a computer screen all day.

The type of coating that is applied to eyeglasses to stop the reflection and glare is something that is referred to as A/R, anti-reflection or antireflective coatings. The Anti-Reflection coating is applied to the surface of lenses and other optical devices. The anti-reflective coating consists of a transparent thin film which contrasts the refractive index. The thin film layer helps change the wavelength and incident angle of the incoming light.

The Anti-Reflective coating and interference based coatings were invented by Alexander Smakula in 1935. Alexander Smakula was working for the Carl Zeiss optics company at the time. The German military actually used the Anti-reflection coatings as a military secret during World War II. It wasn't until 1930 though that Katharine Burr Blodgett and Irving Langmuir developed the organic anti-reflection coatings.

This improves the efficiency of the eyeglass lenses since less of the incoming light is lost. The reduction of the glare and reflections helps improve the contrast of the image one is looking at. By adding the A/R coating one can reduce the stray light in the lenses.

When one applies the coating to a new pair of eyeglasses, this helps enhance eye contact. Another benefit to the anti-glare treatment is the fact it enhances the appearance of your eyewear. Besides the benefits of the anti-glare coating, most A/R coatings include additional coatings that repel water and grease. This makes the lenses very easy to keep clean. The A/R coatings are usually suited towards higher-indexed lenses as they tend to reflect more light. It usually is cheaper to coat higher indexed lenses than that of low index glasses.

The thin film anti-reflective coatings help to greatly reduce the loss of light in the many elements of the lenses. The quarter-wavelength of coating can eliminate all reflection in the eyeglass lens.

Dr. Ruth Tang is the owner of Irvine Optometry in Orange County, California.

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Deciding Whether to Get Laser Eye Treatment or Contact Lenses

The allure of laser eye treatments is to rid you of eyeglasses. Wearing contact lenses is also another means to experience this kind of freedom.

So the final challenge would be: what should I prefer - wearing contact lenses or undergoing laser eye treatment?

There are advantages and disadvantages to both forms of vision correction.

For those who always receive constantly changing prescriptions, refractive surgery is not appropriate for them. This is because the sight may likely alter soon after the procedure, resulting to using glasses, contact lens, or more surgeries to experience clearer eyesight. Disposable lenses can be purchased in small quantities (e.g. 3 months at a time) and the prescription can be updated before each purchase.

If your Rx is very high, laser eye operation will not be able to altogether rectify your sight. Disposable contact lenses get limitations as well, but these restrictions can correct a wider scope of prescriptions. Conventional (or yearly) contact lenses can be specially made to suit even higher prescriptions.

If you have an uneven shaped cornea (the front of the eye), eye surgeries cannot be performed to rectify this. This is generally the case with injury to the eyes or eye diseases affecting the cornea. To right this, RGP (ripid gas permeable or hard) contact lenses are used. Due to the rigid form of the material, the contact lens vaults over the irregular cornea, effectively creating a new, smooth front surface. This in turn gives greater optical clarity compared to soft contact lens.

Although the above three points seem to imply the superiority of contact lenses, there are disadvantages to as well. The disadvantages are specialties where laser eye treatment excels in.

Contact lenses demand habitual upkeep. This means that never-ending insertion, removal, cleaning, and maintaining it can be a trouble. In comparison to laser eye operation, once the eye is recovered, no additional care is required.

Contact lens wear requires the placement of a comparatively big foreign body into the eye. These plastic pieces are often in eyes for long hours. Due to the nature of contact lens wear, you are at a greater risk of eye infections. The risk becomes especially higher if one sleeps while wearing it or fails to properly maintain them. Compared to eye surgery, once the eye is recovered, no maintenance is essential.

A lot of folks need and want the freedom from wearing spectacles, especially for certain activities like playing sports. Rough sports like kickboxing rugby and even swimming can easily dislodge contact lenses. Not only can these sports reposition the lenses, wearing them while doing these activities can also cause them to pop out. Naturally, this will no longer be an issue after having laser eye treatment.

Comparing contact lenses versus laser eye treatment will result to many advantages and disadvantages within the two. The best way to answer this question to find out whether which one is more appropriate for you, set up an appointment with the local optometrist as they are the ones qualified to give professional ideas.

Find out more about Laser Eye Treatment HQ - your source of the latest news and technologies on laser eye treatment, eye surgery, and more.

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The Dangers of Driving Without Wearing Polarized Sunglass Lenses

Who would have imagined that stepping into a car without polarized lenses could be dangerous?

These dangers are real due to the amount of glare refracted off a horizontal surface like a road, or snow covered road, and it's significantly higher than an ordinary situation. Additionally a car's interior, including the dashboard, can reflect light worsening the light sources while driving.

Continual driving in glary conditions can cause eye fatigue leading to driver drowsiness; this is a highly documented contributing factor in car accidents and fatalities. Late afternoon sun, moments of intense glare, and driving close to water surfaces can all cause moments of blinding that effects driver safety. Glare from the sun has been quoted as a key reason for car crashes worldwide. The basic step of wearing polarized sunglass lenses is a practical approach.

Driver Reaction Times

"Reaction times for drivers wearing polarized sunglasses are up to 20% quicker compared to driving without any sunglasses and up to 40% quicker than with ordinary sunglasses. Faster reactions mean that stopping distances are shorter - by up to 6 metres - compared to driving with non-polarized sunglasses, and as much as 3 metres shorter than driving without sunglasses." Results from a Polaroid study found. (Test results available at polaroideyewear.com)

So what are polarized lenses?

Basically, a polarized lens has a specialized coating that is typically injected into the middle of the lens that is polarized vertically. Visible light waves come from all directions and when this fragmented light connects with a horizontal lens plane, high levels of glare occur. A polarized lens reflects the light off the surface of the sunglass lenses, blocking the fragments of light entering the eyes and reducing the overall glare. This greatly reduces harmful UV light allowing the human eye to see contrast and images with much greater clarity than a regular lens as can be seen below.

Given the many benefits of polarized sunglasses it's no wonder they've become a key competitive edge for sports sunglasses. Companies such as Oakley, Rudy Project and Arnette provide a huge range of polarized lenses for their sports sunglass range. Once you're accustomed to wearing sunglasses when driving or outdoors it can become uncomfortable and dangerous to be driving or playing sports without the usual UV protection that your eyes get used to. The answer is to have multiple pairs of good quality sunglasses on hand for every situation. To buy sunglasses online is an easy and usually cost effective way to ensure you have enough pairs of sunglasses for all your daily activities.

The Sunglass Fix are passionate about sunglasses. We want you to get the best out of your sunglasses and offer some of the best after market replacement lenses, or your money back. We want you to continue to enjoy wearing you're favourite sunglasses through scratch free lenses for optimal heath and safety. Visit us today at http://www.thesunglassfix.com/

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The Top Five Reasons To Wear Contact Lenses

While most will wear glasses because they are easy to find, fashionable, and simple, glasses have their definite drawbacks that wearers would not encounter with contact lenses.

5. Contacts allow the wearer to have a form of eye correction that is much easier to manage. Glasses fog up when they encounter the wrong weather or temperature. Glasses also need to be adjusted, nose pieces need to be replaced and adjusted, screws need to be tightened, and lenses have to be cleaned constantly. Simply maintaining a pair of glasses can easily become a part time job. Lenses, on the other hand, simply rest on the surface of the eye and provide clear vision all day long. They are easily cleaned once per day and that is all. It's that simple.

4. As fashionable as designer glasses might be, contact lenses offer everyone around the wearer a clear look at the wearer for the first time. Glasses can get in the way of the natural bone structure and features of a person, this can alter their appearance slightly. Contacts can help anyone go from geek to chic in no time. Plus, they are far more comfortable on your eyes and ears.

3. As another component of one's fashion, contact lenses allow anyone to wear the sunglasses that they like. It's much easier to find a pair of sunglasses that compliments an outfit when one's first concern is not whether they are prescription or not. Not only are prescription sunglasses hard to find in good styles, they are just as expensive as the sunglasses you already wear. Who wants to shell out twice as much money just because the sun came out today? Contacts keep sunglasses costs to a minimum, they allow for any sunglasses choice you like.

2. Lenses also come with another wonderful money-saving feature. Most people who wear contact lenses have multiple pairs. Whereas glasses can be broken without a replacement, contact lenses can be easily replaced from one of the many pairs that are received. The cost of replacement is simply a trip to your spare set. A spare pair of glasses is simply too expensive for most people. A spare pair of contact lenses is much less expensive and much more practical to carry around or travel with.

1. Anyone who enjoys sports or outdoor activities will agree that it's hard to think about playing a game when they are worried about their glasses being broken by a stray ball or a fall on the hiking trail. Contact lenses allow the wearer a chance to participate in sports and outdoor activities without the fear of breaking or damaging their glasses. It's a much safer form of eye correction that is much easier to manage and replace if something were to happen.

No matter the situation, contact lenses are the optimal choice for anyone who needs prescription lenses.

Make the switch to contact lenses today and notice the boost in confidence.

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Implanted Contact Lenses

Reshaping the cornea or the front of the eye with a laser is the most general mode of correcting vision (e.g. PRK or lasik). However, you may not meet the rigorous criteria when it comes to laser eye treatment like this and so other methods would be more right.
One option would be implantable contact lenses. The process primarily involves placing a pre-made plastic contact lens within the eye. This is not to be mistaken as the similar conventional contact lenses you would regularly apply every day as an alternative to spectacles. Implantable contact lenses are designed to sit between the iris (coloured part of the eye) and the natural lens within the eye.

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How to Reuse Daily Contact Lenses

 Reuse Daily Contact Lenses Contact lenses are a convenient way to see clearly without worrying about glasses. They are also used for aesthetic purposes, such as changing your eye color. There are two kinds of daily contact lenses. True daily contact lenses are made to be thrown away each day and should not be worn longer than the manufacturer's guidelines. Attempting to reuse true daily contacts can result in eye problems. Rinse and reuse daily contacts can be reused daily for longer periods of time (usually two weeks) and require certain care.

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How to Measure the Power & Diameter of Contact Lenses

 Contact lens prescriptions have different sizes and measurements. A contact lens has more components and information for correcting vision than a spectacle lens. During an eye exam for contact lenses, an eye doctor takes more measurements of the eye and uses this information to order individually designed lenses for each eye. The power and diameter of a contact lens are determined during a contact lens fitting and are sometimes changed during follow-up appointments or later as the eye and prescription change. Measuring a contact lens power and diameter is done in a few steps.

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What Does H F Mean on Contact Lenses?

 Contact lenses and lens prescriptions have a variety of numbers and letters with different meanings. The American Optometric Association notes that more than 30 million people wear contacts. Lenses are available in soft and rigid material. Each kind of lens and prescription has unique markings, identifications, symbols and letters associated with the contact lenses.

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How to purchase cheap contact lenses

 Contact lenses can be purchased cheaply if you buy them in bulk. Contact lenses are plastic corrective lenses designed to fit directly over the eye. Wearing contact lenses rather than glasses can provide superior vision. The lenses allow wearers to have a greater field of vision and avoid uncomfortably bulky frames and bulging lenses. However, contact lenses can be expensive and may not be covered by your insurance, but there are ways you can purchase them at a discount.

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