Visual fatigue is a group of syndromes in which the human eye sees more than its visual function can carry due to various causes, resulting in visual impairment, eye discomfort or systemic symptoms after using the eye, and thus cannot perform visual work normally. Common symptoms of visual fatigue include: dry eyes, foreign body sensation, photophobia, eye pain, blurred vision, dizziness, headache, nausea, vomiting, insomnia, memory loss, etc. What are the causes of visual fatigue? The causes of visual fatigue are diverse and can be broadly divided into the following three categories: 1, eye factors: abnormal visual function of both eyes, inadequate adjustment and collection; various uncorrected refractive problems, such as myopia, hyperopia, astigmatism, presbyopia and high refractive error; certain eye diseases that cause visual fatigue, such as dry eye, blephar gland dysfunction, conjunctivitis, etc. 2, environmental factors: work and living environment of various light and color vision abnormal stimulation, such as long-term computer workers, or long-term play cell phone. 3, mental and psychological factors: people with high mental stress, neurasthenia or neurosis are more likely to have visual fatigue. How to avoid visual fatigue? 1, habits in life should pay attention to work for a period of time to rest, do not use the eyes for several hours in close proximity; wear suitable glasses; pay attention to the work and study posture and distance; display screen luminosity and clarity should be appropriate, the environment needs to be soft light; eat more food containing vitamin A, vitamin C. 2, self-care adhere to do eye exercises, the use of eye acupuncture points self-massage, help to lift eye fatigue, enhance eye blood circulation, improve visual function. Eye exercises are divided into four sections: (1) knead the upper orbital angle (Tian Ying point). Sit quietly with your eyes closed, with the left and right thumb ribbed surface press the left and right eyebrows under the upper orbital angle, the other four fingers spread out, bent like an arch, support in the forehead, do not press the kneading surface is too large, force is not too heavy. (2) squeeze press the root of the nose (eye point). Left or right hand thumb and index finger squeeze press nose root, first downward, then upward squeeze, a press a squeeze a total of a beat. (3) Press and knead the cheeks (four white points). First with the left and right index and middle fingers together, placed immediately on both sides of the nose, thumb support in the jawbone depression, and then put down the middle finger, in the central part of the cheeks to press and rub. (4) Press the solar plexus wheel to scrape the eye orbits (solar plexus, Zanzhu point, fish waist point, silky hollow point, pupil point, and Chengweigian point, etc.). Bend up four fingers in each hand, press the solar plexus with the ribbed surface of the left and right thumbs, and scrape the upper and lower circle with the inner side of the second section of the left and right index fingers. 3.Remove the causes of visual fatigue Treat dry eyes, blepharitis, strabismus, etc. Patients with poor accommodation can be trained in accommodation. You can also use some artificial tears or drugs that relax the ciliary muscle.