Normal vision in the elderly is still around 1.0. If it is significantly lower than 1.0, especially if it is significantly lower than 0.8, it may indicate that there is some abnormality in the eye. Of course, the abnormality may be caused by refractive error, or it may be caused by eye disease. If it is caused by refractive error, the vision can be improved by glasses. If the vision does not improve or does not improve significantly after optometry, it means that there are organic eye pathologies, such as cataracts, which are common in the elderly, and the phenomenon of blurred vision even after wearing glasses. In addition, the elderly may have age-related macular degeneration or diabetic retinopathy, which can cause vision loss and no improvement in corrected vision. Usually these types of cataracts or fundus problems require surgery to restore vision.