This is not a medicine to improve the feel of view, but as a supplement, which to some extent have a positive effect on your eyes. Blueberries are good for eyesight and strengthens the cardiovascular system. Carotenoids blueberries improve visual function, updating the cells of the retina, improve eye blood circulation. In winter you this wonder berry will not find, and then extract. Saw additive mom says that eye fatigue passes. We took specifically for prevention.