Cataract is currently the world’s first blindness-causing eye disease, of which senile cataract is the most common. According to the survey, there are about 20 million blind people with cataracts worldwide, and there are at least 6.7 million blind people in China, of which 40% to 70% are blind due to cataracts. From the epidemiological survey statistics in recent years, cataract is not the “patent” of the elderly, but the trend of “younger”, which deserves attention and vigilance. Cataracts are generally bilateral, but the onset of cataracts can be sequential in both eyes. The vision is progressively diminished and sometimes a fixed black spot can be seen against a bright background. Due to changes in refractive power in different parts of the lens, there may be hyperopia, monocular diplopia, and increased myopia. Clinically, clouding of the lens is referred to as cataract. There are many older adults with varying degrees of cataract who may also have other eye diseases that are easily overlooked and delayed clinically. What are some common eye diseases that are easily overlooked in the elderly? 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 can have their vision improved significantly through optometry and glasses. Glaucoma is one of the major causes of blindness in China. The onset of chronic closed-angle glaucoma and open-angle glaucoma is usually insidious, with no obvious symptoms and no obvious abnormalities in the frontal segment, so it is not easy to alert patients. 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 occurs mostly in elderly people over 50 years old. It is mostly bilateral, with a slow progressive decrease in visual acuity. 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 quickly. Therefore, in addition to considering cataracts first, elderly people with slow vision loss should be alert to other eye diseases behind cataracts and pay attention to treating common eye blindness-causing diseases while actively treating cataracts to return to a clear world as soon as possible!