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How Contact Lenses Enable You to Have a Better View of the World

By Vincent Davis Subscribe to RSS | February 15th 2012 | Views:
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Although they have been around for a long time, contact lenses obtained their popularity only recently. Continuous research and innovation has led to safer and more practical contact lenses. They have since become favorite alternatives to using eyeglasses since they are more durable. They also help maintain ideal visual span because there are no temple arms obscuring peripheral vision.

Contact lenses are developed to treat common optical disorders like myopia, hyperopia and presbyopia. Contact lenses may also be used to deal with astigmatism. Many contact lenses are custom-made to fit patients with specific optical disorders.

The first contact lenses were made of air-blown or bubble glass. From 1888 to the 1930s, this was the only sort of contact lens on the market. It was only after some time when durable plastic lenses were developed. This material is often called acrylic glass because it works as a good alternative to glass for aquariums and lenses for lighthouses and automobile lights.

The old contact lenses were scleral lenses, placed over the entire visible area of the eye. The first corneal lenses invented in 1949 provided superior comfort, and eventually gained mass appeal by the 1960s.

In the 1970s, the medical community was alerted by different adverse effects caused by wearing contact lens. Perhaps the biggest concern then was that contact lenses appeared to limit the flow of oxygen between the conjunctiva and the cornea, the protective film covering,over, coating the sclera and the irises. To address this, gas-permeable lenses were created. These are also known as hard lenses, which a Langley optometrist can recommend.

Hard lenses are often used by people with keratoconus, an optical problem characterized by a cone-shaped cornea that badly affects vision. Some people who have keratoconus may wear soft hydrogel lenses for a more comfortable fit. Langley optometrists sell silicone hydrogel lenses because of the material's flexibility, attributed to its water content. Some athletes prefer this type of lens due to the silicone hydrogel's exceptional flexibility.

Akin to gas-permeable lenses, silicone hydrogel lenses are also oxygen permeable. However, this material can aggravate the eyes since it naturally repels moisture. If you suffer from dry eye syndrome or keratoconjunctivitis sicca, conventional eyeglasses may be more appropriate as corrective eyewear. However, a new generation of silicone hydrogel lenses has also been developed; this one remains moist even in dry, air-conditioned places like offices and airliner cabins. You may contact Langley optometry professionals to get an eye checkup and get prescription contact lenses.

Vincent Davis - About Author:
For more details, please search "Langley optometrist, Langley optometrists, and Langley optometry " in Google.

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