Vision loss can occur from a variety of causes, including both medical and genetic conditions. Examples of medical conditions include: macular degeneration, diabetic retinopathy, cataracts, and glaucoma. Genetic conditions include: Stargardt’s disease, retinitis pigmentosa, and albinism. Other causes can be congenital or traumatic.
Low vision doctors are more concerned with the amount of remaining vision, not the cause of the loss itself.