Myopia is the eye in the state of relaxed adjustment, parallel light (generally considered from 5m away) through the refractive system of the eye focused on the retina before, resulting in blurred distance vision. Prevent myopia, six good habits To stay away from myopia, the most important thing is prevention. It is vital to develop good habits. 1, when reading, the distance between the book and the eye is best to maintain between 30-35 cm. When the distance is less than 25 cm, the refractive state of the eye is more likely to myopia development. 2, don’t read books when walking or riding in a car. Due to unstable travel, the distance between the book and the eye constantly change, the eye must constantly change adjustment, at this time, such as books are too small or printing unclear, it is easy to cause visual fatigue. 3, do not lie down to read a book. On the one hand can not maintain a reasonable distance; on the other hand, it is also difficult to get the right natural lighting and artificial lighting, easy to visual fatigue. 4, read when the light should be sufficient. To be shot from the left, evenly not shaking eyes, do not read in strong direct light, so as not to damage vision. 5, the continuous reading time should not be too long. After every 45 minutes of reading, you should rest for 10-15 minutes and do eye exercises, recess or outdoor activities, you should look up into the distance. 6, adhere to do eye exercises. It helps to relieve eye muscle fatigue, enhance eye blood circulation, to prevent myopia and protect vision. The so-called pseudomyopia is a state of fatigue before the real myopia, if this state can not be relieved in time, the eyes have been organically changed to form the real myopia. To determine true or false myopia, a dilated eye exam is required. The purpose of dilated pupils is to relieve eye fatigue and relax the muscles that are tense and regulated so that the refractive error is accurate. If the naked eye vision can reach 1.0 after pupil dilatation, it is “pseudomyopia” and can be cured in a short period of time, such as the use of drugs, acupuncture, buried ear needles and physical therapy equipment, which can relax the tense muscles, relieve fatigue and restore vision to a normal state. If you do not want to treat it, your vision may also be restored if you let your eyes look far away and take care of rest. If your bare eye vision is less than 0.8 after pupil dilatation, then you have “true myopia”. True myopia, once formed, is irreversible. It is an organic change in the eye, where the anterior and posterior axes of the eye become longer, and external objects are imaged in front of the retina through the refractive system of the eye, so there is no clear image on the retina, and of course there is no good vision. This organic change can not make the eye shorten and change the refractive power by any method except surgery, which is the reason why myopia is difficult to cure.