"A diet rich in vitamin C could cut risk of cataract progression by a third suggests a study being published online today in Ophthalmology http the journal of the American Academy of Ophthalmology http The research is also the first to show that diet and lifestyle may play a greater role than genetics in cataract development and severity.  Cataracts http occur naturally with age and cloud the eyes lens turning it opaque. Despite the advent of modern cataract removal surgery cataracts remain the leading cause of blindness globally. Researchers at Kings College London looked at whether certain nutrients from food or supplements could help prevent cataract progression. They also tried to find out how much environmental factors such as diet mattered versus genetics.  The team examined data from more than  pairs of female twins from the United Kingdom. Participants answered a food questionnaire to track the intake of vitamin C and other nutrients including vitamins A B D E copper manganese and zinc. To measure the progression of cataracts digital imaging was used to check the opacity of their lenses at around age . They performed a followup measurement on  pairs of the twins about  years later.  During the baseline measurement diets rich in vitamin C were associated with a  percent risk reduction for cataract. After  years researchers found that women who reported consuming more vitamin Crich foods had a  percent risk reduction of cataract progression.  Genetic factors accounted for  percent of the difference in cataract progression. Environmental factors such as diet accounted for  percent. These results make the study the first to suggest that genetic factors may be less important in progression of cataract than previously thought. How vitamin C inhibits cataract progression may have to do with its strength as an antioxidant. The fluid inside the eye is normally high in vitamin C which helps prevents oxidation that clouds the lens. More vitamin C in the diet may increase the amount present in the fluid around the lens providing extra protection. Researchers noted that the findings only pertain to consuming the nutrient through food and not vitamin supplements. The most important finding was that vitamin C intake from food seemed to protect against cataract progression said study author Christopher Hammond M.D. FRCOphth professor of ophthalmology at Kings College London. While we cannot totally avoid developing cataracts we may be able to delay their onset and keep them from worsening significantly by eating a diet rich in vitamin C. Genetic and Dietary Factors Influencing the Progression of Nuclear Cataract http YonovaDoing et al. Ophthalmology article in press March . DOI .j.ophtha.... For a full copy of the study please contact the Public Relations Department at mediaaao.org mailtomediaaao.orgsubjectNewswiseArticleReporterFollowupbccreportersnewswise.com. For more information on cataracts visit the American Academy of Ophthalmologys EyeSmart public information website http About the American Academy of OphthalmologyThe American Academy of Ophthalmology is the worlds largest membership association of eye physicians and surgeons. A global community of  ophthalmologists we are passionate about protecting sight and fighting preventable blindness. For more than  years we have been educators innovators and advocates for the public and our profession to ensure the highestquality medical and surgical eye care. Our EyeSmart program is a preeminent source of eye health information for the public and empowers people to preserve their vision. For more information visit http About OphthalmologyOphthalmology the official journal of the American Academy of Ophthalmology publishes original peerreviewed clinicallyapplicable research. Topics include the results of clinical trials new diagnostic and surgical techniques treatment methods technology assessments translational science reviews and editorials. For more information visit http  Global Data on Visual Impairments WHO"