So what are some common and easily overlooked eye diseases in the elderly? Refractive errors Refractive errors include myopia, hyperopia and astigmatism, all of which can lead to vision loss. As people age, their refractive state changes. Many elderly people with mild cataracts have less vision than before due to a decline in their ability to adjust, and their vision can often be improved significantly through optometry. Glaucoma Glaucoma is one of the major causes of blindness in China. Chronic closed-angle glaucoma and open-angle glaucoma are usually insidious, with no obvious symptoms and no obvious abnormalities in the frontal segment, so they are not easy to alert patients and are easily missed. Age-related macular degeneration is also known as age-related macular degeneration. It is one of the most common blindness-causing eye diseases among the elderly in Western countries. In recent years, due to the improvement of living conditions and health of our people, the incidence of this disease is also increasing year by year. It is generally believed that the disease is related to a variety of factors such as long-term chronic photodamage to the macula of the fundus, genetics, metabolism and nutrition. It mostly occurs in elderly people over 50 years old. It is mostly bilateral, with a slow progressive loss of visual acuity. Diabetic retinopathy Diabetic retinopathy is one of the common and serious complications of diabetes. The prevalence of diabetic retinopathy is about 50% in urban diabetic patients. The influencing factors are mainly related to the duration of diabetes and how well the diabetes is controlled. In addition elderly people with diabetes have a higher incidence of senile cataracts, which occur earlier and progress relatively faster. Therefore, it is important not to simply attribute all vision loss in the elderly to senile cataracts, but also to be alert to other eye diseases behind cataracts to avoid delaying treatment.