Visual fatigue, also known as eyestrain, is a conscious symptom caused by the interaction between the visual organ and the working environment, which mainly manifests as sore eyes, blurred vision, double vision, headache, dizziness, discomfort, and fatigue. The occurrence of visual fatigue is related to the abnormality of regulation, the abnormality of the function of the spokesman and the disorder of the balance of eye muscles, especially in patients with refractive error and oblique, and the pupil is too large or too small can also cause visual fatigue. In addition, the influence of environmental factors, long hours of close work, do not pay attention to eye hygiene, unreasonable lighting, poor surroundings, poor rest, lack of sleep, suffering from chronic conjunctivitis, trachoma and other eye diseases, general weakness, etc. can cause visual fatigue, visual fatigue is a subjective symptom, the first thing to pay attention to the obvious symptoms of self-conscious rest, do not use the eyes excessively, pay attention to overcome bad eye habits, refractive error, refractive aberration, strabismus The majority of patients can be improved by timely correction of refractive error, refractive aberration, strabismus, etc., and by strengthening physical fitness.