What's wrong with staring?

1, long-term stay up late

if the patient long-term stay up late and lack of sleep, resulting in fatigue and concentration, so that the brain in fatigue state to reduce the ability to deal with external stimuli, causing dull eyes.

2, myopia

patients because the eyes can not clearly see distant objects, resulting in eye gaze on objects at close range, affecting the expression of eyes, causing daze.

3, depression

depression patients due to chemical imbalance in the brain, resulting in emotional and cognitive function damage, and thus affecting the expression and communication of eyes, resulting in dull eyes.