Loss of vision; No light perception (NLP); Low vision; Vision loss and blindness
Blindness has many causes. In the United States, the leading causes are:
The type of partial vision loss may differ, depending on the cause:
Other causes of vision loss include:
Blindness is a lack of vision. It may also refer to a loss of vision that cannot be corrected with glasses or contact lenses.
People with vision that is worse than 20/200 with glasses or contact lenses are considered legally blind in most states in the United States.
Vision loss refers to the partial or complete loss of vision. This vision loss may happen suddenly or over a period of time.
Some types of vision loss never lead to complete blindness.
When you have low vision, you may have trouble driving, reading, or doing small tasks such as sewing or making crafts. You can make changes in your home and routines that help you stay safe and independent. Many services will provide you with the training and support you need to live independently.
Your health care provider will do a complete eye exam. The treatment will depend on the cause of the vision loss.
For long-term vision loss, see a low-vision specialist, who can help you learn to care for yourself and live a full life.
Sudden vision loss is always an emergency, even if you have not completely lost vision. You should never ignore vision loss, thinking it will get better.
Contact an ophthalmologist or go to the emergency room immediately. Most serious forms of vision loss are painless, and the absence of pain in no way diminishes the urgent need to get medical care. Many forms of vision loss only give you a short amount of time to be successfully treated.
Kraut JA. Vision rehabilitation. In: Tasman W, Jaeger EA, eds. Duane's Ophthalmology 2013 edition. Philadelphia, PA: Lippincott Williams & Wilkins; 2013:vol 1, chap 46.
Olitsky SE, Hug D, Plummer LS, Stahl, ED, Ariss MM, Lindquist TP. Disorders of vision. In: Kliegman RM, Stanton BF, St. Geme JW, Schor NF, Behrman RE, eds. Nelson Textbook of Pediatrics. 20th ed. Philadelphia, PA: Elsevier; 2016:chap 621.
Yanoff M, Cameron D. Diseases of the visual system. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 423.
Review Date: 8/20/2016
Reviewed By: Franklin W. Lusby, MD, Ophthalmologist, Lusby Vision Institute, La Jolla, CA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
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