Research has shown that vitamin E, found in nuts, fortified cereals and sweet potatoes, can protect cells of the eyes from damage. This damage is caused by unstable molecules called free radicals, which break down healthy eye tissue. When this happens, the risks for age-related macular degeneration (AMD) and cataract formation increase. Worldwide, more than 25 million people are affected by AMD. In the Western world, AMD is the leading cause of blindness in people over age 55. The number of people with AMD is expected to triple by 2025 as the population ages.