Word: corneal
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...your vision while you sleep. That's the promise of a new contact lens made by Paragon Vision Sciences of Mesa, Ariz. The firm's Corneal Refractive Therapy lens is worn overnight to flatten the top layer of the cornea. In the morning the contact comes out, and the wearer has normal vision for one to three days, until the cornea gradually reverts to its normal shape. Similar contacts have been around for decades, but these are the first approved by the FDA for wear during sleep. They are especially attractive to athletes and those who find daytime lenses uncomfortable...
CORNEAS There aren't many treatments for a scarred cornea, the opaque outer layer of the eye, since corneal tissue can't be easily replaced. But it may be possible to grow a new one. Doctors have successfully transplanted tissue from other parts of the eye to reconstruct the cornea and restore sharper sight to a handful of patients...
...CORNEAS There aren't many treatments for a scarred cornea, the opaque outer layer of the eye, since corneal tissue can't be easily replaced. But it may be possible to grow a new one. Doctors have successfully transplanted tissue from other parts of the eye to reconstruct the cornea and restore sharper sight to a handful of patients...
...patients treated had so severely damaged their corneas (the transparent layer that covers the iris) that conventional cornea transplants were no longer an option. Some 2,000 to 4,000 Americans suffer similar corneal scarring each year--from chemical burns, diseases or chronic inflammation, according to Dr. Ivan Schwab at the University of California at Davis, who led the U.S. team. The operation, however, cannot help those with congenital retinal or optic-nerve disorders...
Treating myopia with corneal surgery is like treating obesity with liposuction. Corneal surgery is an elective procedure that carries the risk of serious and permanent complications. Corneaplasty, now in FDA trials, could carry fewer risks. While both corneaplasty and corneal surgery are treatments for refractive errors, neither is a cure for myopia. You cannot treat myopia comprehensively just by altering the shape of the cornea. High tech may be glamorous, but it is not always the best medicine. JULIE RALLS, M.D. Newport Beach, Calif...