Some advice for your diet: avoid caffeine. It is a very prevalent drug in our society, but it may not be right for you. Begin to open your mind and your palette to alternative substances, the most common being herbal infusions, especially green tea. The stress of caffeine on the eyes (vision) can adversely affect you. Also, include fresh fruits and vegetables that nourish your eyes: cantaloupe, cranberries, and blueberries. These delicious food sources certainly taste better than any medicine!