If you, a family member, or a friend has one or more eye disorders, such as glaucoma, cataracts, macular degeneration, or diabetic retinopathy, it’s important to have a low vision examination – performed by an ophthalmologist or optometrist who specializes in low vision – to determine whether special low vision optical devices, better lighting, large print reading materials, or other types of training, such as vision rehabilitation services, can help the person with low vision to use his or her functional vision more effectively.