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Legally blind vision5/7/2023 Low vision is sometimes used to describe visual acuities from 20/70 to 20/200. The rest have some vision, from light perception alone to relatively good acuity. In many areas, people with average acuity who nonetheless have a visual field of less than 20 degrees (the norm being 180 degrees) are also classified as being legally blind.Īpproximately ten percent of those deemed legally blind, by any measure, have no vision. This means that a legally blind individual would have to stand 20 feet (6 m) from an object to see it with the same degree of clarity as a normally sighted person could from 200 feet (60 m). In North America and most of Europe, legal blindness is defined as visual acuity (vision) of 20/200 (6/60) or less in the better eye with best correction possible. In order to determine which people may need special assistance because of their visual disabilities, various governmental jurisdictions have formulated more complex definitions referred to as legal blindness.īasic labeled diagram of the human eye. Blindness is also defined as visual acuity of less than 3/60, or corresponding visual field loss to less than 10 degrees, in the better eye with best possible correction. A person with only light projection can tell the general direction of a light source. Those described as having only "light perception" can see no more than the ability to tell light from dark. Total blindness is defined as the complete lack of form and light perception and is clinically recorded as NLP - an abbreviation for no light perception.īlindness is the term frequently used to describe severe visual impairment with residual vision. Various scales have been developed to describe the extent of vision loss and define blindness: Life After Death: Reviving Light-Sensing Cells in Donor Eyesīlindness is defined as the condition of lacking visual perception due to physiological or neurological factors.Dry Eye Can be Caused by Drop in Temperature. ![]() Optic Neuritis: Symptoms, Causes, Treatment.This article is from our digest of publications relating to Blindness and Vision Loss that also includes:
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