Eat Right to Beat Eye Disease
A diet high in whole grains may help keep your vision sharp
Macular degeneration--the most common cause of blindness in people over 65--might be avoided by replacing refined carbs with whole grains
As the Western world's population continues to live longer, age-related problems like macular degeneration are becoming more common. Fortunately, diet may play an important role in prevention: A new study shows that macular degeneration--the most common cause of blindness in people over age 65--might be avoided by replacing refined carbohydrates with whole grains.
The glycemic index connectionMacular degeneration attacks the part of the eye responsible for central vision. In its early stages, the disease may make straight lines appear wavy or make objects look fuzzy. As it progresses, reading, driving, and other activities that require sharp vision become more difficult.
In the new study, over 4,000 people between ages 55 and 80 had their diets categorized by glycemic index--a measure of food's blood sugar--raising effects. A high-glycemic-index diet raises blood sugar levels after a meal more than a low-glycemic-index diet does.
Compared with people with diets that measured lowest on the glycemic index, people eating the highest glycemic index foods were almost 1 1/2 times as likely to have features of macular degeneration. The higher the dietary glycemic index, the more severe the disease. Further, people with a higher than average glycemic index diet had a 49% increased risk of advanced macular degeneration.
"We estimate that 20% of cases of advanced macular degeneration would be eliminated if people consumed diets that have dietary glycemic index values below the median," the study's authors concluded.
Tips to reduce your risk
Choosing unprocessed, whole foods appears to be a wise choice for eye health. The researchers noted, "Our results also suggest that the quality, not the quantity, of dietary carbohydrates influences the risk of macular degeneration."
(Am J Clin Nutr 2007;86:180-8)
Kimberly Beauchamp, ND, earned her bachelor's degree from the University of Rhode Island and her Doctorate of Naturopathic Medicine from Bastyr University in Kenmore, WA. She cofounded South County Naturopaths in Wakefield, RI. Dr. Beauchamp practices as a birth doula and lectures on topics including whole-foods nutrition, detoxification, and women's health.