US scientists have identified two genes responsible for macular degeneration, the gradual deterioration of eyesight in the elderly that can lead to blindness, a study showed this week.The research published 24 April 2007, in the Journal of the American Medical Association also showed that smoking and being overweight carry a strong risk of the condition, in which the central part of the eye's retina degenerates.
Video Ad Feedback
Your brain on déjà vu
Ever experienced déjà vu? CNN's Sanjay Gupta explains what's happening in your brain when it occurs.
2:08 • Source: CNN
Your Health 8 videos
US scientists have identified two genes responsible for macular degeneration, the gradual deterioration of eyesight in the elderly that can lead to blindness, a study showed this week.The research published 24 April 2007, in the Journal of the American Medical Association also showed that smoking and being overweight carry a strong risk of the condition, in which the central part of the eye's retina degenerates.
Video Ad Feedback
Your brain on déjà vu
2:08
Now playing
• Source: CNN
hep b thumb1.jpg
Video Ad Feedback
At 16 he learned he had hepatitis B. Now, a proposal to delay vaccination worries him
2:31
Now playing
• Source: CNN
Video Ad Feedback
CDC advisers set to vote on changes to childhood vaccines
6:30
Now playing
• Source: CNN
RFKVaxMeg_Thumb_HD_Clean.jpg
Video Ad Feedback
Kennedy’s handpicked CDC advisers could change childhood vaccine schedule
1:50
Now playing
• Source: CNN
Climbers going to sleep on a portaledge very high above the ground on the mountain face
Video Ad Feedback
How to fall asleep anywhere, from airplanes to your office nap room
2:04
Now playing
• Source: CNN
lisa split 1.jpg
Video Ad Feedback
It's OK if your kid's schedule is packed as long as you keep one thing in mind
1:49
Now playing
• Source: CNN
gratitudemic_thumb1.jpg
Video Ad Feedback
‘I finally got a girlfriend today!’ Kids' announcements go viral
1:49
Now playing
• Source: CNN
eve.jpg
Video Ad Feedback
How to improve your sleep and when to seek medical attention
6:01
Now playing
• Source: CNN