The most common symptom of foraminal retinal detachment is a black shadow floating in front of the eyes and a fixed black shadow gradually moving from a certain direction to the center, while in patients with macular schisis retinal detachment, the fixed black shadow starts from the center and gradually expands to the periphery. Anyone with macular involvement will experience vision loss, but the patient’s eyes are not red or painful. Some patients experience flashes of light, while others experience distorted vision, with large objects becoming smaller and straight objects becoming curved. Some patients, especially teenage students, due to excessive study tasks, too much eye use, the peripheral part of the retina in the constant contraction of the extraocular muscles often receive pulling, gradual degeneration, the formation of fissure, and this fissure is mostly a small round hole, often located in the lower part of the water due to gravity, the vitreous body of the water through the fissure into the retina under the retinal detachment of the retina leads to the development of the process is very slow until the impact of the central When vision is affected, a long period of time has elapsed. These patients often do not have the above typical symptoms, coupled with the fact that many students have myopia, for the vision loss caused by retinal detachment is often thought to be caused by myopia and did not consult a doctor in a timely manner, until the optometrist with glasses only to find that vision can not be corrected to normal, optometrists recommended to the ophthalmology examination, and found to have been a retinal detachment of the old.