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See the World Better thru Contact Lenses

By Vincent Davis Subscribe to RSS | February 15th 2012 | Views:
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Although they have been around for ages, contact lenses obtained their popularity only recently. Continuous research and development has led to safer and more functional contact lenses. They have since become favorite alternatives to wearing eyeglasses since they are less fragile. They also help maintain good visual span as there are no temple arms blocking peripheral vision.

Contact lenses are meant to treat various optical disorders like myopia, hyperopia and presbyopia. Contact lenses may also be used to treat astigmatism. Many contact lenses are fashioned 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 type of contact lens that exist. It was only after some time when durable plastic lenses were made. This material is commonly called acrylic glass because it serves as an excellent alternative to glass for aquariums and lenses for lighthouses and automobile lights.

The first contact lenses were scleral lenses, worn over the entire visible portion of the eye. The first corneal lenses invented in 1949 provided better comfort, and eventually gained public interest by the 1960s.

In the 1970s, the medical community was alerted by various adverse effects caused by wearing contact lens. Perhaps the most important concern then was that contact lenses tended to to restrict the flow of oxygen between the conjunctiva and the cornea, the protective film covering,over, coating the sclera and the irises. To deal with this, gas-permeable lenses were developed. These are also known as hard lenses, which a Langley optometrist can recommend.

Hard lenses are commonly used by people suffering from keratoconus, an optical disorder characterized by a cone-shaped cornea that impairs vision. Some people who suffer from 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 kind 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 irritate the eyes since it naturally repels moisture. If you suffer from dry eye syndrome or keratoconjunctivitis sicca, conventional eyeglasses may be more effective as corrective eyewear. However, a new generation of silicone hydrogel lenses has also been developed; this one remains moist even in dry, air-conditioned environments like offices and airliner cabins. You may contact Langley optometry professionals to get an eye exam 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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