![]() ![]() People who have slight refractive errors, or problems like nearsightedness or farsightedness, may see the Snellen chart differently. The measurement of 20/20 vision in the United States means that you can see letters on the Snellen eye chart clearly from 20 feet away. Most people believe that 20/20 vision, which is a measurement of visual acuity or clarity of vision at a distance, is “perfect.” However, this measurement is only one of several ways to understand good or great vision and one way for optometrists and ophthalmologists to diagnose and treat vision problems. What Is 20/20 Vision? Is It Perfect Eyesight? Research from the National Institute of Health shows that about 35 percent of American adults have 20/20 vision without the aid of vision correction. There are two main ways that you can achieve this: through LASIK surgery and through corrective lenses. Although 20/20 is the standard by which we measure good eyesight, it’s possible to improve acuity to be stronger than 20/20.
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