Before each semester’s exams is the heaviest time for young students to study, students often spend all day doing homework, practice problems, reading and memorizing texts. This time is also the most likely to occur and aggravate the occurrence of myopia, especially in elementary school, middle school and high school graduation students, should pay attention to eye hygiene, protect the eyes, prevent the occurrence of myopia and aggravate myopia. How can myopia develop after long hours of reading? The long time spent reading and studying, the eyes need to be adjusted for a long time, which can easily cause adjustment spasm, the ciliary muscle regulation performance is weakened, causing the lens to adjust changes to reduce the lens in a long-term convex state, even when looking at the distance is not relaxed, resulting in reduced farsightedness, it becomes “pseudomyopia”. And because of the heavy study tasks during the period before the exam, long hours of reading eyes do not get timely rest and treatment, further development into true myopia. In addition, reading for too long the convergence of the eyes for a long time, the extraocular muscles are highly tense pressure near the eye, a long time will make the front and rear diameter of the eye become longer to form myopia. Some students who have been suffering from myopia, in order to see the font often put the books very close, which increases the regulation of the eyes, coupled with a long time of reading books to do homework, more likely to cause regulatory spasm, so that the eyes appear vision fatigue, reading words, eye distension, vision loss, myopia degree deepened. In addition, visual fatigue can also cause excessive tension in the cerebral cortex, a sense of tension or pain in the forehead, and even vertigo, nausea and other symptoms. In this way, the content learned can not be well sense comprehension, and it is impossible to deepen the memory. Students who are generally physically weaker are prone to these systemic symptoms and myopia. In order to prevent the occurrence and aggravation of myopia, to prevent the general discomfort caused by visual fatigue, students who have the habit of reading and studying for a long time, especially near the exam, should pay attention to the reading time can not last too long, generally should be in about 1 hour to take a proper break of 10 minutes. Break to outdoor activities, so that the eyes to the distance 5 meters away from the place to look, and can do eye exercises, in order to make the tension of the eye adjustment muscle to relax and relieve, eliminate spasm, relieve fatigue, vision recovery, so that the body and memory is also beneficial. At the same time, you can use eye drops such as Jane’s Eye, Avedo, etc. to eliminate eye fatigue, and you can also use drops of Topamax, Medrol, Safije eye drops at night before going to bed to relax the ciliary muscle that is continuously contracted. In addition, the total time spent reading should be limited to a maximum of 10 to 12 hours per day. In life, you should get enough sleep, the sleep time for teenagers is usually 8~10 hours. Try not to watch or watch less TV. The diet should be complete with a variety of calories and various nutrients, and high protein foods such as meat, fish and milk should be given. Vitamin A is important for the formation and function of eye vision, and vitamin A cannot be synthesized in the human body, so it must be taken from food. Animal liver, dairy, egg yolk, cod liver oil, etc. have high vitamin A content. Fresh fruit contains a lot of vitamin C, should be given more to supplement. It is best to take time out of your busy schedule to participate in some physical exercise, which is good for your eyes and body.