Issues With Multi-Focal Contact Lenses

 Multi-focal contact lenses help you see both near and far. Multi-focal contact lenses incorporate two or more prescriptions in one lens to provide both distance and near corrections. They are available in soft contact lenses or rigid gas permeable (GP) lenses. Although multi-focal contact lenses offer convenience , there are some issues that come with wearing multi-focal contact lenses.

Chemical Composition of Contact Lenses

 Contact lenses are composed of many chemicals like those found in chemistry labs. Contact lenses can be categorized as soft conventional hydrogel, silicone hydrogel, or rigid gas permeable contact lenses. According to Contact Lens Spectrum, all contact lenses utilize a polymer backbone. A polymer is a chemical chain formed from linking many smaller molecules.
Soft conventional hydrogel contact lenses share a common backbone of the polymer polyHEMA. This polymer serves as the base for all soft contact lenses, and different brands are formed by injecting differing amounts of water and other chemicals into the contact lens as it is manufactured.

Contact Lenses That You Wear at Night

 The only lens style to be approved for continuous use for up to 30 days, silicone hydrogel lenses allow for much more oxygen permeation than standard contacts. This means that they do not get uncomfortable or feel "dried out" after a day's use. The increased permeability also means less risk of infection due to their ability to breathe better than standard contacts.

Is Povidone in Contact Lenses a Preservative?

 Povidone helps keep your contact lenses clean. Povidone is a common ingredient in ophthalmology products such as eye drops. While it is not an ingredient in contact lenses, it often coats the surface of the lenses when they are in their packaging, in their cases or being worn in a patient's eyes.

Benefits of Aspheric Design

 Many eyeglasses are made with aspheric lenses. There are several advantages of aspheric design when it comes to eye care, and many eye care professionals now offer glasses made with these specially designed lenses. An aspheric lens is a change from the usual spherical lens, whose surface curves much like a baseball. An aspheric lens has a more even surface area that results in some favorable characteristics.

How to Use Proclear 1 Day Contact Lenses

 Using Proclear 1-Day contact lenses is not complicated. Proclear 1-Day contact lenses were developed and released by CooperVision. They are disposable and are intended for only one day of use before they are discarded and replaced with a new set. They are designed to keep the eyes moist and comfortable during the entire time of use and are sold at a lower price to make them more attractive to consumers in comparison to other disposable brands. Using Proclear 1-Day contacts is meant to be as simple as possible.

Do Contact Lenses Cause Extreme Redness?

 Extreme eye redness can be from contact lenses. The use of contact lenses can lead to conditions that cause extreme redness. You might wear them too long, get something underneath a lens or have a more serious infection like keratitis. Although many people wear contacts without problems, there are risks associated with their use.

How to Tell if Your Contact Lenses Are Ready to Be Changed

 Contact lenses need to be right side up to fit correctly in the eye. Hard plastic contact lenses date back to 1936, yet consumers have largely replaced wearing them with soft contact lenses. Soft contact lenses have been available commercially since 1971. They are more comfortable than hard contact lenses, given that they are made of thinner, more pliable material. The main issues with wearing hard or soft contact lenses are dryness, cleanliness and slippage.

Polycarbonate Lenses Vs. Polarized

Eyeglass frames can hold a variety of lenses. Because people have different problems with their vision or require certain characteristics from their glasses lenses, eyeglass companies manufacture specific types of lenses to accommodate these needs. Polarized and polycarbonate lens types vary by shape and composition.
Polycarbonate lenses are shaped like most other lenses in a spherical shape. Polarized lenses are also spherical. The difference is shape between the two lenses is that polycarbonate lenses are typically lighter than polarized lenses. In fact, some polycarbonate lenses are up to 35 percent lighter and thinner than regular plastic lenses, according to Frames Direct.

How to Fit Contact Lenses With Keratoconus

 A rigid gas permeable contact lens Keratoconus is a degenerative eye disorder which is characterized by corneal thinning and protrusion resulting in decreased vision such as shortsightedness and corneal distortion.
Rigid gas permeable contact lenses (also known as hard lenses) are the first option for keratoconus when good vision is not achievable with the use of spectacles.

What Does Rx Mean for Contact Lenses?

 A contact lens Rx, or prescription, includes several measurements that result in a well-fitting lenses. Contact lenses are medical devices that can only be purchased with a prescription. Visit a licensed optometrist or ophthalmologist to obtain a prescription or Rx. Understanding how to read your Rx will help you identify your eye-care needs.

Disadvantages of Hydrogel Contact Lenses

 Hydrogel contact lenses consist of interconnected polymers.
Hydrogel contact lenses, also known as soft contact lenses, consist of superabsorbent, interconnected polymers. As of 2010, there are two main types of these lenses on the market: traditional or HEMA lenses, which contain the compound 2-hydroxyethyl methacrylate, and silicone hydrogel lenses, which use silicone instead. Both types of hydrogel lenses have advantages over their hard counterparts, known as RGP (rigid gas permeable) contact lenses. However, they also have several disadvantages.