1, the desktop light, the best light from the left or left front, don't let the shadow of your hand cover the light when writing. 2. Get rid of bad eye habits, don't read books lying down, don't walk in moving carriages, and don't read books in strong sunlight or dim light. 3, to achieve the correct reading and writing posture, keep "one foot, one punch and one inch", that is, the eyes are one foot away from the book, the body is punched from the table, and the fingers are one inch away from the pen. Write and read continuously, rest for 45 minutes (10- 15 minutes) or overlook, so that the ciliary muscles can rest. 4. Pay attention to choosing foods that are healthy for eyes in daily diet to ensure eye nutrition supply, such as eating more foods containing carotene, such as carrots, tomatoes, various green vegetables, animal livers and fresh fruits.