Vitamin C found in berries helps in maintaining collagen in the cornea of the eyes and capillaries in the retina. The bioflavonoids or flavonoids also found in berries are said to be good for the eyes. Blueberries and bilberries (a type of fruit related to blueberry) are good sources of bioflavonoids. Both these fruits also contain anthocyanins which are antioxidant pigments. Anthocyanins are said to help reduce the risk of cataracts and AMD or macular degeneration. Studies have shown that anthocyanins also increase the ability of the eyes to adjust to the dark, enhancing photosensitivity. Certain prescription drugs that contain extracts of the bilberry fruit are also said to be beneficial for diabetic retinopathy and preventing the progression of retinal damage caused by high blood pressure.

Anthocyanosides act to strengthen the walls of delicate blood vessels around the eyes and reduce inflammation thus protecting the retina. The positive effects on vision improvement in studies utilize extracts of fresh bilberry fruits that contain at least 25% anthocynosides. Raspberries and strawberries are also good sources of antioxidants that are beneficial to eye health in much the same way as bilberries. Raspberries, however, are said to contain 50% more antioxidants than strawberries.

The goji berry is grown in the northern part of China. It is also referred to as the longevity fruit because of the antioxidant and anti-aging properties it possesses. It is a small, red-colored fruit that most of the locales include in their daily diets. This is another type of berry that is said to have good effects on healthy vision. The goji berry contains lutein and zeaxanthin which are carotenoids that protect the retina from photodamage and other age-related eye problems such as macular degeneration and cataracts. Including berries such as bilberries, blueberries, raspberries, strawberries and the goji berries in your daily diet can help in maintaining good eye health.