Semi-detachment of retina is a serious condition that requires medical treatment as soon as possible, otherwise it can cause vision loss or even blindness. Retinal hemianopsia belongs to the category of partial retinal detachment, which is the separation of the neuroepithelial layer and the pigment epithelial layer of the retina. The detached part of the retina is unable to perceive light stimulation, resulting in incomplete or total loss of images from the eye. Partial detachment of the retina is also considered an ophthalmic emergency and a critical condition that requires prompt hospitalization for appropriate treatment. If not treated in time, it can affect the patient’s vision and even lead to blindness, which is a more serious eye disease that needs to be treated at the right time. It is recommended that patients with retinal detachment consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.