The physiological function of the retina is to form sharp vision; therefore, the main symptoms of retinopathy are to cause varying degrees of vision loss, distortion of vision, abnormal color vision, and eventually even loss. There are various types of retinopathy, and the manifestations vary from disease to disease. Retinal hemorrhage and exudation, which are the most common fundus conditions, are often caused by a number of systemic diseases, such as diabetes, hypertension, kidney disease, and blood disorders. When blood pressure is unstable or blood sugar is poorly controlled, complications may occur in multiple parts of the body, of which ocular complications are its main organ. Retinal perivasculitis, which is more likely to occur in younger patients, can likewise lead to bleeding and exudation. Due to the obscuration of the lesion, or the destruction of the retinal tissue at the lesion, the light sensitivity within the retina is reduced, inevitably causing a loss of vision. Macular lesion, a type of retinal lesion. Since the macula is the richest in light-sensitive cells and therefore the sharpest in vision, it is also responsible for the formation of colored vision. Therefore, in the early stage of macular disease, there will be very obvious vision loss, and often accompanied by visual distortion, such as: seeing straight lines as curved, seeing things smaller, and also prone to color vision abnormalities, seeing objects grayish and not vivid. This is a typical manifestation of macular area involvement. Retinal detachment can be manifested as an obvious sense of black obscuration of visual objects. In conclusion, the retina is the most important eye tissue for forming vision, and once the lesion occurs, it will cause serious damage to vision and is often irreversible. Therefore, it is important to seek prompt medical attention once the disease has developed.