20:20 Vision

20/20 vision describes normal visual acuity—the clarity or sharpness of your eyesight measured at a standard distance. The first number, 20, indicates the distance in feet that you are standing from an eye chart. The second number shows the distance at which a person with normal eyesight can read the same line. So, 20/20 means you can see clearly at 20 feet what should normally be visible at that distance. It doesn't measure other aspects like peripheral vision or eye health but is a common way to assess visual sharpness.