The retina is the light-sensitive part of the eye, similar to the negative and light-sensitive chip of a camera. When the retina becomes diseased, vision is affected. Retinal detachment refers to the separation of the retina from the tissue beneath it. Retinal detachments can be divided into two categories: primary and secondary. Primary retinal detachment is caused by retinal tears from various causes. While secondary ones are mainly secondary changes caused by diabetes, hypertensive fundus hemorrhage, retinal inflammation, fundus tumor, etc. Except for exudative retinal detachment in secondary retinal detachment which is mainly treated by medication, all other retinal detachments need surgical treatment. The purpose of retinal detachment surgery is to reset the retina to avoid complete loss of vision and eye atrophy. The recovery of vision after surgery varies depending on the extent, cause and primary disease of the retinal detachment. However, in general, most people will maintain their vision after surgery, the dark shadows will disappear and the atrophy of the eye will be controlled, otherwise, the vision will be completely lost and the eye will be atrophied and affect the appearance, and some patients will have eye pain, etc.