Word: corneas
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...takes half an hour and costs $3,000 to $4,000 per eye. In a company-sponsored study, 92% of 662 patients who got the Verisyse lens had 20/40 or better vision after three years; 44% tested 20/20. But patients also showed a steady loss of cells in the cornea, and the FDA has asked for a five-year follow-up study to track long-term effects...
...correct poor eyesight in a million American patients a year. Dr. Keith Walter at Wake Forest University reports that the hotter and more humid it is when doctors perform the operation, the more likely patients are to come back for follow-up procedures. High humidity can apparently cause the cornea to swell, affecting the surgeon's accuracy. --By Sora Song
...uses radio waves to tighten small areas of collagen, creating a constrictive band, like a belt, that increases the curvature of the cornea and brings near vision back into focus. But CK won't be the last word on presbyopia. Other techniques are in the pipeline vying for the looming market of 90 million baby boomers. --By David Bjerklie
There's a new Lasik in town. You remember the old Lasik, the eye operation that improves vision by reshaping the cornea with lasers. The new version is called wavefront-guided Lasik and depends on technology developed by astronomers to correct problems in high-powered telescopes. Wavefront Lasik uses 200 little lenses to map the cornea, taking into account all its bumps and abnormalities to produce a highly accurate, individualized prescription. Conventional Lasik, by contrast, applies one standard formula to each eye. If the old Lasik is off the rack, wavefront is a custom-fit procedure. Studies show that...
...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...