In the U.S., (1) Visual acuity of 20/200 or worse in the better eye with corrective lenses. (2) Visual field restricted to 20 degrees diameter or less (tunnel vision) in the better eye. Note these criteria are used to determine eligibility for government disability benefits and do not necessarily indicate a person's ability to function.
Best-corrected visual acuity of 20/200 or worse, or reduction in visual field to 20 degrees or less, in the better-seeing eye.
blindness as recognized by law which in most states of the U.S. means that the better eye using the best possible methods of correction has a visual acuity of 20/200 or worse or that the visual field is restricted to 20 degrees or less
In the U.S., (1) visual acuity of 20/200 or worse in the better eye with corrective lenses (20/200 means that a person must be at 20 feet from an eye chart to see what a person with normal vision can see at 200 feet) or (2) visual field restricted to 20 degrees diameter or less (tunnel vision) in the better eye.
Central visual acuity is 20/200 or less in the better eye with the use of the best corrective lens; or a field defect in which the widest diameter of the remaining field subtends an angle no greater than 20 degrees.
Best corrected visual acuity of 20/200 or less in the better eye, or visual field no more than 20 degrees in the better eye.
a central vision acuity for distance of 20/200 or poorer in the better eye with correction; or a field of vision no greater than 20 degrees in widest diameter
visual acuity that does not exceed 20/200 in the better eye with correcting lens; field of vision no greater than 20 degrees in its widest angle (visual acuity of 20/200 means that a person can see at a distance of 20 feet what one with "normal" sight can see at 200 feet)
20/200 vision in your best eye. In other words, while wearing glasses or contacts you see objects clearly at 20 feet what a normal eye sees clearly at 200 feet.
This is not a medical term but a legal one. It means that someone has 20/200 vision or worse in both eyes using the best pair of glasses. It can also refer to someone who has better than 20/200 vision but whose visual field is 20 degrees or less. The top number in the ratio refers to the distance the patient is in feet to the eye chart; the bottom number refers to the size of the letters or numbers.
In Ireland this is a visual acuity of 6/60 or worse in the better eye with corrective lenses (6/60 means that a person standing 6 metres from an eye chart sees what a person with normal vision can see at 60 metres) or if the field of vision is limited, the widest diameter of vision subtending an angle of not greater than 20 degrees.
A standard of visual acuity set at 20/200
Having a visual acuity that can not be corrected to better than 20/200 or having 20 degrees or less (tunnel vision) of visual field remaining.
In the U.S., it is a term defined in the Social Security Act (section 216(i)1) as central visual acuity of 20/200* or less in the better eye with the use of a correcting lens, or a limitation in the field of vision such that the widest diameter of the visual field subtends an angle no greater than 20 degrees. (* This means that what a person with normal vision can see at 200 feet, a legally blind person can see at 20 feet.)
