2007-10-07 07:10:08 · 12 answers · asked by Anonymous in Health ➔ Optical
20/20-1 means that when the doctor projected the 20/20 line for you to read you missed one letter on the line. If you had missed two letters on the line then you would have 20/20-2. If you miss more than half of the letters on the 20/20 line then the doctor would write 20/25 + the number of letters you succesfully read on the 20/20 line. For instance if you could only read one letter on the 20/20 line then he would have written 20/25 + 1. Hope this helped.
2007-10-07 08:04:14 · answer #1 · answered by yagman 7 · 6⤊ 0⤋
Actually, a person with 20/20 eyesight is described as being able to see detail from 20 feet away that a person with normal eyesight could see from 20 feet away. Likewise, a visual acuity of 20/10 means that a person can see detail from 20 feet away that a person with normal eyesight could see from 10 feet away.
2007-10-07 07:18:21 · answer #2 · answered by swash2314 3 · 2⤊ 0⤋
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2016-07-14 13:48:08 · answer #3 · answered by ? 4 · 0⤊ 0⤋
Normal visual acuity. Upper number is the standard distance (in feet) between an eye being tested and the eye chart; lower number indicates that a line of letters or symbols of a small specific size can be read from 20 feet away.
2007-10-07 07:13:58 · answer #4 · answered by claudiacake 7 · 3⤊ 0⤋
it means perfect or average eyesight.
http://www.google.com/search?hl=en&q=what+is+20%2F20+eyesight&btnG=Google+Search
there is also the saying that "hindsight is 20/20" meaning the when you look back at things in the past, because you have the benefit of knowing the future so to speak, you can see what you couldn't see back when you made your initial decision..
2007-10-07 07:14:40 · answer #5 · answered by Anonymous · 0⤊ 0⤋
the one that is 20-1 means it sees slightly less than the 20.
But at least you almost have perfect 20/20 vision!! (20 is the perfect amount of what you can see through your eye, not too bright/dull/near/far/blurry/or sharp!!)
2007-10-07 07:15:18 · answer #6 · answered by Anonymous · 1⤊ 1⤋
1
2016-06-19 05:25:17 · answer #7 · answered by ? 3 · 0⤊ 0⤋
20201 eyesight
2016-02-02 09:31:11 · answer #8 · answered by ? 4 · 0⤊ 0⤋
Did you ever tested out Vision Without Glasses program? Check out at this place : http://Guide.ClearVisionExercise.com . This is able to extremely manage one and all!
2014-07-30 10:57:47 · answer #9 · answered by Anonymous · 0⤊ 0⤋
My daughters have still not stabilised at 22 so a way to go yet.
2016-03-19 07:08:56 · answer #10 · answered by Anonymous · 0⤊ 0⤋