Right eye 4.5 left eye 4.9 usually need to wear glasses. Right eye 4.5 left eye 4.9 first need to determine whether the true myopia, true myopia is generally need to wear glasses, if you do not wear glasses will cause myopia gradually deepen, but also may appear vision fatigue, amblyopia, myopia glasses have the role of corneal reshaping, can avoid patients with the degree of increase. Usually, attention should be paid to eye hygiene, at the same time, correcting bad eye habits such as playing with cell phones for a long time, sitting in an improper posture, etc., strengthening outdoor activities, shortening the time of eye use, avoiding watching TV for a long time as well as studying under strong light, etc.. It is recommended to go to the hospital for regular medical checkups, and go to the ophthalmology department in time to improve the examination and follow the doctor’s instructions for treatment when you find vision loss.