Vision loss and blurred vision need to be treated according to the cause in order to improve the symptoms, such as refractive error caused by wearing glasses to correct the blurred symptoms, cataract caused by the need for surgical treatment in order to eliminate the blurred symptoms. Vision loss, blurred vision is one of the most common symptoms of ophthalmology, does not have the specificity, can not be based on this symptom to determine which disease, patients need to go to the hospital ophthalmology department to carry out relevant examinations to diagnose the specific causes of different causes of vision loss, the treatment method is different, and can not be generalized. Refractive error is the most common cause of vision loss in adolescents, which can be diagnosed through an optometry examination and subsequently corrected through the prescription of eyeglasses. Cataracts are the most common cause of vision loss in the elderly, and are usually treated with surgery, such as cataract aspiration with ultrasonic emulsification combined with IOL implantation. Blurred vision should be treated under the guidance of a doctor.