1, reading and writing posture should be correct. Whether reading or writing should be done in front of the desk, and must sit in a chair, back straight, eyes more than 30 cm from the book, book or computer screen. 2, not lying down to read. The two eyeballs have the function of often keeping horizontal, once lying down to read, the two eyeballs will desperately want to keep horizontal. As a result, the focus will produce a gap from the correct position, thus causing vision loss, and even make changes in the eye axis. 3, do not forget to stretch the back muscle. Even if you initially maintain the correct reading and writing posture, a long time down will become a person leaning forward, the neck bent forward posture. Therefore, every once in a while, we must stretch the back muscles, correct posture. 4, table and chair height to be appropriate. Reading and writing to maintain the correct posture sitting on the chair, avoid shaking feet in mid-air, which will not be able to maintain the correct posture. 5, do not read in the car. The illumination in the car is not enough, the external light is easy to make the written light and dark. Text with the car forward and shaking, it is easy to cause neck bending, eye fatigue. 6, appropriate rest. Do not read and write for more than 50 minutes at a time, and then take a 10-minute break. Because a study has shown that in a semester, the student continuous close learning 2 or 3 hours, the incidence of myopia than close learning every 1 hour rest 1 time 30% higher. When reading and writing for long periods of time every 30 minutes you have to let your eyes rest for 5 minutes, raise both hands upward, straighten your backbone or look at the distance.