Reporting on the public health implications of the national Age-Related Eye Disease Study (AREDS), published two years ago and supported by the National Eye Institute, a team of Johns Hopkins ophthalmologists and other scientists participating in AREDS estimate there are 8 million people in the United States age 55 or older at high risk for advanced forms of the disorder that destroys central vision and who could benefit from daily vitamin treatment. They include people with an intermediate stage of AMD in one or both eyes, or advanced AMD in one eye. AMD is the leading cause of blindness in developed countries.
The original AREDS investigation, of 4,757 adults ages 55 to 80 with varying levels of AMD, showed that among people at high risk for late-stage AMD and central vision blindness in both eyes, a dietary supplement of vitamins C, E and beta carotene along with zinc lowered the risk of progressing to advanced disease by about 25 percent. Daily supplements also reduced the risk of vision loss by about 19 percent. By contrast, the supplements had no preventive effects against development of cataracts or for people without AMD or an early stage of AMD.
"Without treatment to reduce their risk, we estimate that 1.3 million
adults would develop the advanced stage of AMD," says Neil M. Bressler,
M.D., lead author of the current study, published in the November issue of
the Archives of Ophthalmology, and the James P. Gills Professor of
Ophthalmology at Hopkins. "The challenge lies is identifying individuals
at risk, since many with the interm
Contact: Karen Blum
Johns Hopkins Medical Institutions