Ophthalmology has an emergency department. Emergency ophthalmology is mainly used for the treatment of some critical diseases, including ocular trauma, glaucoma, electrophthalmia, acute conjunctival inflammation, and so on. When these diseases appear, it is necessary to go to the hospital early, as long as the regular hospital, whether during holidays, weekends and at night, there are staff on duty to see the ophthalmology emergency. Many diseases cannot be delayed, and if the best time for treatment is missed, it may cause irreversible effects, such as central retinal artery blockage, which can have a serious impact on vision and even form optic nerve atrophy if the onset of the disease is longer than four hours. Therefore, once any discomfort in the eye appears, you need to go to the hospital early for relevant examination and early treatment after clarifying the condition, only then can you avoid serious damage.