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Get your usual prescription at a discounted price from our online superstore. We specialize in offering the lowest prices possible on brand name disposable contacts. We also offer extended wear, special effects contacts, tinted contacts, and more! Look hereOver 32 million people in the freshlook United States wear these small lenses that fit on top of the cornea. They provide a field of view unobstructed by lenses frames; they do not fog-up or get splattered, so it is possible to see well while walking contact in the rain; and lens they are less noticeable than any lenses style. On the other freshlook hand, they take time to get accustomed to; require more measurements for fitting; require many follow-up visits to the eye doctor; can lead to complications such as infections and corneal damage; and may not correct astigmatism as well as lenseses, especially if the contact astigmatism is severe. Glass was the first material to be used for lenses lenses, and was used for several hundred years before plastic was introduced. lens The crown glass used for lenses lenses has an index of refraction of 1.52.Optical-quality freshlook acrylic was introduced for lenses use in the early 1940s, but because it was easily scratched, brittle, and discolored rapidly, it did not supplant glass as the material contact of choice. Furthermore, it had a relatively low index of refraction, so it wasn''t suitable for lens people with freshlook large refractive errors. A plastic called CR-39, introduced in the 1960s, was more suitable. Today, lenses wearers can also choose between polycarbonate, contact which is the most impact-resistant material lens available for eyewear, and polyurethane, which has exceptional optical freshlook qualities and an index of refraction of up to 1.66, much higher than the conventional plastics contact used for lenses, and even higher than glass. Patients with high prescriptions should ask about high index material options for their lenses. Aspheric lenses are also useful for high prescriptions lens. ©2003 www.contacts-soft-colored.com. All rights reserved. |