When the eyes encounter high heat or chemicals, the eyelids will quickly close reflexively to avoid burns. However, extremely high temperatures can still burn the eyeball. The severity and pain of the burn depend on the depth of the burn. Chemical burns can be caused by some irritating substances entering the eye. Even substances that are not too irritating can cause obvious eye pain and damage. Because of the severe pain, the eyelids are closed tightly, which can cause the chemicals to stay in the eye for a longer time, aggravating the damage. Among the eye injuries caused by chemicals, 17% are caused by solid chemicals, 31% are caused by liquid chemicals, and 52% are caused by chemical fumes. Among these chemical-induced eye injuries, it can be caused by direct contact of the chemicals with the eyes, or it can be absorbed through the skin, respiratory tract, digestive tract, etc., affecting the eyes, visual pathways or visual centers and causing damage.