contact lens sale

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Extended-wear (overnight) Lenses--rigid or soft--increase the risk of corneal ulcers, infection-caused eruptions on the cornea that can lead to blindness. Symptoms include vision changes, eye redness, eye discomfort or pain, and excessive tearing. The risk of corneal ulcers for people who keep extended-wear contact lenses in overnight is 10 to 15 times greater than for those who use daily-wear lenses only while awake, lens says the FDA''s Center for Devices and Radiological Health. When the eyes are open tears carry adequate oxygen to the cornea to keep it healthy. But during sleep, the eye produces fewer tears, causing the cornea to swell. Under the binding down of a rigid contact lens during sleep, the flow of tears and oxygen to the cornea is further reduced. This lack of oxygen leaves the eye vulnerable to infection. Extended-wear rigid lenses also can cause unexpected, sometimes undesirable, reshaping of the cornea.

Typical teen curiosity has some eye doctors concerned about infections that could spread from one youngster to another when they trade cosmetic Lenses. The lenses often worn to change eye color or add designs, but not necessarily to correct vision. And with this Halloween sparking the highest-ever interest in novelty lenses -- the kind imprinted with images -- consumer groups are warning users about the dangers of lens swapping. Fortunately, cases have been rare, but some have been serious. Kids are unaware sale that these are optical devices, and they''re using them as toys. Soft Lenses are like sponges, and they can hold onto bacteria. Doctors also warn that an ill-fitted lens can cause contact damage to the eye''s surface. Even if a lens does not correct vision, it is considered a medical device and can be sold only by prescription. Wearers must have eye exams; lenses must be fitted properly.

Typical soft Lenses have a transmissibility of 20 barrers. Lenses made with fluorosiloxane have a transmissibility of 175 barrers."The dream of a soft hydrogel that delivers sufficient oxygen lens has finally been realized with this material," he said. Fluorosiloxanes are currently under review by the Food and Drug Administration for sale in the United States. The materials are already available in 16 other countries as 30-day extended-wear and daily-wear sale lenses, which are removed every night and cleaned. Some people find it difficult to keep hydrogel lenses clean, opening up the potential for nasty eye infections. Lenses of fluorosiloxane provide less of a problem than the others because proteins don''t stick well to them. Wearers of most other types of soft lenses have to use enzyme solutions to remove protein deposits that the hydrogels attract.

Are you in the market for some new contacts? Are you looking for quality contacts by Biomedics? Check us out. We have a comprehensive selection of contacts by all the major manufacturers including Biomedics.