This is the standard: For vision measurements, 20/20. Being the best vision you need to achieve. You see at 20 feet what a person without any vision correction can see at 20 feet.
Answered 12/28/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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