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.
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