It seems like lots of fruits and vegetables (high in antioxidants) are key to preventing cataracts, as well as sunglasses to protect the eyes from radiation. Colorful fruits and vegetables and dark leafy greens contain good amounts of Vitamin C and E as well as minerals and lutein and zeaxanthin. Eating fish with lots of omega-3 fatty acids are associated with prevention also. Overall, high levels of antioxidants in the diet and low levels of simple carbohydrates correlated with better vision. Cataract risks increase with the consumption of fried and sugary foods/beverages as well as high salt and exposure to pollution and cigarette smoke. Some good research is presented in this article.
Creating Healthy Lifestyles