What does it mean when you have got 20/20 Vision? 20/20 Vision is a term coined from an in office test to determine visual acuity or clarity of vision. If we're getting technical, the term 2020 actually refers to the size of a letter, a person can read when they are 20 feet away. When you walk into the exam room, and you see the Big E on the top of the chart, that's a 2200 letter. The next line down is 2100 and so on and so forth until you get to that small 2020 line, which is actually optimal vision that we check for in the exam. When patients have trouble seeing smaller letters on the eye chart, glasses and contacts can be prescribed to correct vision to a point where the 2020 line becomes focused. Measuring visual acuity is important, and is used as a way for your eye doctor to standardize how you're seeing over time. It can be used as a comparison tool from exam date to exam date. For example, if you saw 2020 last year, and you're seeing the 2030 ...
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