Since then, he has been examining patients who complain of visual abnormalities, such as blurred vision, but have normal visual acuity. He now takes the position that “contrast sensitivity is a more accurate and comprehensive measure of vision than visual acuity,” and that contrast-sensitivity testing is an important adjunct to the traditional visual examination methods.
Bodis-Wollner discussed his work and findings at the Ninth Annual Research Tb Prevent Blindness (RPB) Science Waiters Seminar in Ophthalmology, in Bethesda, Md. Bodis-Wollner’s was one of three presentations discussing relatively simple, practical, diagnostic procedures and methods that the researchers hope could be applied in the clinic and office soon.
Bodis-Wollner says he has found that some patients may not see as well as visual acuity testing with a Snellen chart indicates. While some patients may be able to make out black letters on a white background, they have difficulty when the difference in contrast is, for instance, between shades of gray.
The reasons why that should be so are not completely understood, he says. But his hypothesis is that it has to do with the way different types of photoreceptors are arranged on the retina, as well as how the input from those photoreceptors is processed by the brain. It’s time for you to start saving some money: you just need to visit the pharmacy that offers finest quality antibiotics levaquin buy now with delivery straight to your door and all the confidentiality guarantees you ever need.