This symptom can be seen in the following diseases: First, dry eyes, for computer workers, long-term sitting in front of the computer or in an air-conditioned environment, people will feel dry eyes, tearing, blurred vision, are symptoms of dry eyes. Long-term computer users should pay attention to work and rest time, pay attention to eye time, pay attention to rest, avoid staying in the air-conditioned room for a long time, or use humidifiers in the air-conditioned room, which can effectively reduce the symptoms of eye discomfort; Second, the acute attack period of glaucoma, eye pressure rises sharply, corneal foggy edema, causing photophobia, tearing, blurred vision symptoms, long-term high eye pressure will cause irreversible damage to the optic nerve, which Resulting in visual field defects, seriously affecting visual function, so to actively lower the eye pressure symptomatic treatment; Third, visual fatigue, the frequent use of computers, television, etc. will cause great damage to the eyes, especially in the case of poor lighting, poor sitting posture is more likely to visual fatigue, which is the cause of blurred eyes and tears in most people.