1, myopia prevention 1, genetics and myopia: adolescent myopia is a multi-factor genetic eye disease, first of all, should promote eugenics, avoid both spouses are highly myopic patients; secondly, should pay attention to pregnancy health, premature babies and low weight children myopia prevalence is particularly high. 2, reading, writing and myopia: two to, two not in prevention. (1) Reading and writing posture should be correct, while doing the three “one”: that is, the distance between the eyes and the book should be maintained a foot; chest from the edge of the table a fist; hand from the pen tip an inch. (2) continuous reading and writing for about 30-60 minutes to rest for a moment or look into the distance for a while. Two do not: (1) do not read and write in low light and direct sunlight. (2) Do not read in bed or walking or in a turbulent car. 3, lighting conditions and myopia: lighting does not meet the requirements, too strong or too weak light is also the main factor causing myopia. Lighting in the home to 60W incandescent lamp placed on the upper left corner of the desk is appropriate. 4, rays and myopia: TV sets, game consoles, computers and other fluorescent screens emitting rays are invisible to increase the burden on the eyes, mastering the time spent with the eyes, the brightness of the screen, contrast and the use of protective shields and other facilities, can effectively prevent damage from rays. 5, watch TV, computer to pay attention to: (1) control the time to watch TV, computer: adolescent students should not exceed 30 minutes on weekdays, holidays should not exceed 2 hours, myopia tendency or has been myopia of adolescents time to reduce accordingly. (2) the distance, location and angle of the TV should be appropriate: the distance between the seat and the TV should be 5 times the diagonal of the screen is more appropriate. Such as watching 20-inch TV distance should be greater than 2.5 meters. When watching TV should be sitting in front of the fluorescent screen, such as sitting on the side to watch TV, the angle of deflection should not exceed 45 degrees. Especially not lying on the bed or sofa to watch TV. (3) At night when watching TV should not turn off all the lights in the room, should be in the back or side of the seat to open a soft small light, the brightness should be able to read the newspaper as appropriate. 6, physical fitness and myopia: malnutrition, lack of exercise, irregular life, acute and chronic infectious diseases, physical weakness, etc. are prone to visual fatigue and contribute to the deepening of myopia. Partial diet has a significant impact on vision development. Adequate sleep has a relieving effect on ciliary muscle spasm. 7, eye care exercises: carefully complete eye care exercises not only facilitate the prevention and treatment of adolescent pseudomyopia, but also can relieve the visual fatigue generated by prolonged eye use. 8, active participation in vision care: every 3-6 months for vision care, so that early detection of myopia and determine the best preventive and corrective measures. 9, active early intervention in vision correction: to avoid the formation of hazy images on the retina, such as early correction of myopia and corneal astigmatism, can effectively stop the development of myopia and astigmatism. 10.Actively participate in outdoor activities: adopt the method of far-seeing or the method of adjustment-assembly training to increase the visual distance, open up the field of vision, relax the adjustment and maintain normal visual function. Myopia treatment: (1) relaxation and adjustment: tropicamide, etc.; (2) artificial tears; (3) improve eye circulation. 2, frame glasses; 3, soft contact lenses; 4, rigid gas permeable contact lenses (referred to as RGP lenses); 5, corneal plastic lenses; 6, other auxiliary health rehabilitation measures; 7, riboflavin supplementation.