See Also: Blindness(medicine)
Blindness(health)
day blindness(medicine)
blindness(encyclopedia)
functional blindness(medicine)
music blindness(medicine)
night blindness(medicine)
note blindness(medicine)
object blindness(medicine)
psychic blindness(medicine)

Blindness (health)


Legal blindness is defined as: 1) visual acuity of 20/200 (only being able to see the big E on the eye chart) or less in the best eye even with the eyes corrected by glasses or contact lenses; or, 2) The peripheral visual field is reduced to 20 degrees of visual angle or less. Twenty degrees of visual angle is about the size of a one foot ruler held at arms length.