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 »

www.reference.com Health Vision

According to MedlinePlus, a visual acuity measurement of 20/25 is only slightly worse than average. What "20/25" basically means is that a person's eye can see at 25 feet what a typical eye can see at 20 feet. More »

www.reference.com Health Vision

A visual acuity of 20/50 is defined as visual impairment, as stated by WebMD. This means that the individual can see objects that are a distance of 20 feet away clearly, but an individual with normal vision can see the s... More »

www.reference.com Health Medical Ranges & Levels

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 »

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 »

A person with 20/40 vision sees an eye chart 20 feet away that a person with normal vision sees at 40 feet away. All 50 states require a person to have 20/40 vision or better to pass a driver's license examination withou... More »

A person with 20/25 vision can stand 20 feet from an eye chart and see the same detail as a person who has 20/20 vision that stands 25 feet from the same chart, according to Divyesh Eye Hospital. The term "20/25 vision" ... More »