Could watching TV too much cause blindness?

Researchers from the University of Wisconsin recently linked inactivity to one type of macular degeneration. This disorder occurs when blood vessels in the eye leak fluid, which can lead to blindness. The study found that people who were active at least 3 times a week were less likely to develop the disease. I thought this article was interesting because it shows that even something like they eye, which we don't usually associate with physical activity, can be affected by exercise and cardiovascular health. As our book would say, the body is an integrated system!

http://www.usnews.com/usnews/health/articles/061102/2health.htm