Recently, dry eyes are mostly seen in dry eye disease, the reason is very complex, if the eyes continue to use for a long time, such as looking at cell phones, computers, TV is easy to cause, and the eyes are closely related to the reduction of transient reflexes, the number of transient blinks in the waking state is generally 6-12 times / minute. If you continue to stare at the cell phone screen, the number of blinks will be reduced, at this time the tear evaporation is fast, the tear film is not stable, it is easy to lead to dry eyes, wind and sand, soot, room temperature is too high, not ventilated, dirty can also be induced by dry eyes. The occurrence of dry eye is closely related to the use of diuretics, anti-psychotic depression drugs, reduced levels of sex hormones, and inflammatory damage to the ocular surface, manifested as dry eye sensation, foreign body sensation, burning sensation, photophobia, vision fluctuations, eye fatigue, etc. Tear secretion test, tear film rupture time, tear osmolality and other tests can be a clear diagnosis, and the general use of artificial tears, such as polyvinyl alcohol eye drops and other treatments, specific treatment to be decided according to the condition.