Blindness may be caused by acute glaucoma, senile cataract or retinal detachment, which requires targeted treatment such as opening of the angle of the eye and ultrasonic emulsification of the lens. When persistent blindness occurs, the first step is to consult a doctor in a timely manner for ultrasound, fundus photography, macular optic nerve OCT and other ancillary examinations to identify the cause of the disease, and then choose emergency treatment or book a surgery according to the severity of the disease. For example, acute glaucoma requires emergency rescue to lower intraocular pressure, which may lead to irreversible visual field defects or even blindness if not treated in time. Obvious ones such as sudden blindness caused by trauma need to describe the cause and course of the injury in detail to the doctor at the time of consultation, so that the doctor can make a quick judgment, and then take treatments such as debridement and suturing, removal of intraocular foreign bodies or vitrectomy. People with sudden or progressive vision loss or even blindness should go to the ophthalmology department in time to find out the cause of the disease and then treat the cause and symptoms.