Elderly people with blurry eyes can be caused by refractive error, senile cataract, keratitis and other reasons. 1. Refractive error: including nearsightedness, farsightedness, astigmatism, presbyopia and other conditions, may appear in the elderly eyes blurred to see the situation, need to go to the hospital in a timely manner to check the optometry, if necessary, wear glasses. 2. Age-related cataract: a common disease among the elderly, usually caused by degenerative changes in the lens as the elderly age, which may result in blurred eyes. 3. Keratitis: the cornea of the cornea of the elderly by the environment, endogenous pathogenic factors invasion caused by corneal inflammation, resulting in blurred vision, there may be a blurring of the eyes to see the situation. Mosquitoes, fundus diseases and other causes can also cause the elderly to appear blurred vision, it is recommended that the patient timely consultation, under the guidance of the doctor to improve the examination, targeted treatment.