Low vision is a medical condition for types of visual impairment where conventional corrective measures such as regular glasses, contact lenses, and surgical or medical treatment cannot adequately correct the deficit. It often presents with the following:
Low vision is the result of partial but irreversible visual impairment. A diagnosis does not mean that you are blind. It just means that you have problems that cannot be corrected with conventional interventions, and that you may require vision devices and training to enhance your remaining eyesight. In most instances, a person retains some degree of vision that usually responds well to specialty glasses or other vision aid.
There are a variety of diseases, disorders, and types of eye injury affecting the optic nerve that may cause impairment and a diagnosis of low vision. These include types of acute and traumatic brain injury. Medical conditions that are known to cause this condition include age-related macular degeneration, cataracts, glaucoma, diabetic retinopathy, retinitis pigmentosa, corneal diseases, optic nerve atrophy, and strokes. Age-related macular degeneration accounts for almost 45 percent of such cases.