Visual fatigue is a common disease in ophthalmology nowadays. Patients have various symptoms, the common ones include unsustainable near eye use, pain around the eyes and orbits, blurred vision, dry eyes, tearing, etc., and in severe cases, headache and vertigo. Visual fatigue it is not an independent disease, but a group of fatigue syndrome caused by various reasons. Symptoms: difficulty in seeing near, difficulty in lasting, blurred vision: 1. External symptoms: burning sensation in the eyes, irritation, tearing, dry eyes. 2, internal symptoms: headache, fatigue, pain, diplopia, blurred vision. 3. Six visual function factors cause visual fatigue: uncorrected refractive error, inadequate regulation, occluded strabismus, inadequate collection function, inadequate image integration, and unequal object images in both eyes. Adjustment disorder is the main cause of visual fatigue. Patients with visual fatigue often show reduced amplitude of accommodation, reduced sensitivity of accommodation, posterior shift of the near point of accommodation, delayed rate of accommodation response and accommodation response time, and increased low frequency components of accommodation micromovements. If you have persistent visual fatigue symptoms, we recommend that you have a visual function test to analyze the cause and make the appropriate treatment plan.