There's many ways to protect your eyes from long time use except sleep in natural ways. In order to protect your eyes from the disease, please doing the follows, make sure relax 10-15min after every 2 hours computer work or book reading. Looking far distant view, taking eye exercises or massages both ok. Take more exercises such as table tennis, badminton, football, golf etc. with your eyes follows the aim of ball. The eyes muscles constantly with relax and contract; it will enhance the blood circulation volume and metabolism around the eyes to relief the eyestrain. Take care of the nutrient balance with Calcium, protein taking, avoid food preference and control the sweet food quantity. These nutrient elements will protect your eyes and less sweet food will help the vitamin B1 remain. Eyes drop and periodic physical examination will also help with the healthy care of your eyes.