Ocular trauma is caused by mechanical, physical, and chemical factors that act directly on the eye, causing structural and functional damage to the eye. According to the injury-causing factors, ocular trauma can be divided into mechanical eye injury and non-mechanical eye injury. A, mechanical eye trauma 1, contusion: boxing injuries, badminton, basketball bombs 2, perforation injuries: knives, scissors, bamboo sticks fried eye 3, intra-orbital foreign body: common in knocking iron Second, non-mechanical eye trauma 1, chemical eye trauma chemical poisoning: lead, mercury, carbon monoxide, carbon dioxide, alcohol chemical burns: acid: hydrogen chloride, sulfuric acid 2, thermal burns 3, radiation eye trauma ultraviolet light: electrophotography Ophthalmia (welders) infrared microwave According to the different severity of trauma, ocular trauma can be divided into three categories: light injuries include eyelid abrasions and bruises, subconjunctival hemorrhage, foreign bodies on the surface of the conjunctiva and cornea, corneal epithelial abrasions, eyelid Ⅰ degree thermal burns, irritating gas injuries, electrophotographic uveitis, etc.; moderate injuries include eyelid and tear duct lacerations, eyelid Ⅱ degree thermal burns, bulbar conjunctival tears, superficial corneal foreign bodies, etc.; severe injuries including extensive laceration defect of eyelid, Ⅲ degree burn of eyelid, penetrating injury of eyeball, intraorbital foreign body, blunt contusion of eyeball with intraocular hemorrhage, chemical injury of eyeball above Ⅱ degree, radiation injury, orbital bone fracture, etc.