Just like drunk, reading too much makes nerves feel fatigue. If the brain slow down, not only eyes can be affected, but also other parts of body. We often feel our brains cannot think any more after a long time working and reading. That's because brains need time to take oxygen and blood supplements. Then let brain have a good rest, or double vision, dizzy and headache begin to occur. If you always reading too much, you'll read more near and near. Then myopia follows you. When nerves that govern eye movements being hurt, eye strain and dry eyes occur naturally. However, these eye problems are the basic problems of other eye disorders, such as glaucoma, conjunctivitis and red eyes. So you must have a limitation of reading if you want to have healthy eyes. Plus, when you feel tired after reading, please close your eyes and have a good rest. You also can drink a cup of black tea which is good to recover eye sight, even you can apply cucumber slices to keep eyes fresh.