20/20 vision means that a person has normal visual acuity measured at 20 feet of distance, according to the American Optometric Association. The first number refers to the distance of the patient's visual acuity, while t... More »

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Visual acuity of 20/80 is not "bad" enough for a patient to be legally blind, according to the Social Security Administration. Patients with 20/80 vision may need eyeglasses or contact lenses to aid with the visual acuit... More »

The average visual acuity for humans is 20/20. While 20/25 vision is below average, it isn't considered low vision. Visual acuity is a rating of "clearness" of vision, so 20/25 vision is slightly blurrier than average. L... More »

To test distance vision, individuals stand 20 feet from the Snellen eye chart, cover one eye, read aloud the smallest line they can clearly see, and then repeat this process with the other eye, states MedlinePlus. To tes... More »

Loss of vision in one eye, or acquired monocular vision, makes depth perception extremely difficult, especially when gauging the distance within 3 feet of the eye, according to the Neuro-Optometric Rehabilitation Associa... More »

According to the Ohio Lions Eye Research Foundation, a person with 20/600 vision sees something at 20 feet away that a person with typical 20/20 vision sees at 600 feet. In another comparison, a person sees an object at ... More »

A person with 20/15 vision can see an object from 20 feet away with the same acuity as a normal person would at 15 feet away. Technically, then, a person with 20/15 vision has better than perfect vision. More »