Word: helping
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Dates: during 1990-1999
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...also important to realize that 20/20 vision isn't synonymous with perfect eyesight. The standard eye chart measures vision under conditions in which contrast is high. But there are other factors, like how well you see in dim light or discriminate among various shades of gray, that help determine the overall quality of your vision and that can be adversely affected by LASIK...
...colored part of your eye. Depending on how bright the incoming light is, the pupil grows wider or narrower, much like the adjustable aperture of a camera. The light then passes through the lens, which lies directly behind the iris and changes shape as needed--curving or flattening--to help focus the image onto the retina, the light-sensitive tissue at the back of the eyeball that converts the light into electrical signals. From there, the optic nerve sends these impulses to the brain's optic centers, which create the picture in your mind...
...happens, the eye's lens provides just a third of the eye's focusing power. The rest comes from the cornea, which acts like a second lens to help focus light onto the retina. If you're nearsighted, or myopic, your eye produces clear images of nearby objects or people. But light from distant sources is focused on a point somewhere in front of your retina--either because the curve of your cornea is too steep relative to the length of your eyeball, or the eyeball is too long relative to the corneal curve. If you're farsighted, or hyperopic...
Lasers that target only the color red have been used since the 1970s to treat birthmarks, port-wine stains and other blemishes. Doctors now believe these lasers work better in children than in adults, but they can help diminish unsightly scars and red stretch marks left over from childbirth or breast surgery. Lasers can also soften acne scars, though removing the scars altogether is difficult. Green-light lasers are effective at zapping broken blood vessels and spider veins on the face, hands and neck. But the process can be painful--just ask tough guy Mark Anfangar, 44, vice president...
Instead, he set out to "find the essence of the drug" and remove the side effects. When Pamukcu arranged for scientists at the University of Arizona to take on the research, Nichols moved to Tucson to help oversee their work. The scientists determined that the body breaks down sulindac into two components, but then got bogged down in a debate about which of these components to pursue. After listening to the pro and cons, Nichols decided for them--they would explore both chemical pathways. In the test tube, one compound quickly proved to be superior. "It was killing...