Analysis: all contacts are harmful to the eyes, not to wear the best! Then the big brand, the quality of the contact lenses are at risk, even high oxygen permeability, high water content of the contact lenses, can not meet the physiological requirements of the eye. Advice: Wearing colored contact lenses, due to excessive chemical composition, may be due to bad wearing habits, eye sensitivity and weather reasons, causing eye congestion, inflammation, severe corneal hypoxia will lead to deformation and eye infections resulting in corneal perforation and other serious eye diseases, and even lead to permanent eye blindness