4 doctors weighed in:
What is 20/20 and 20/30?
4 doctors weighed in

Dr. Robert Carroll
Nuclear Medicine
3 doctors agree
In brief: Sharpness of sight
20/20, 20/30, measures of sharpness of sight, ability to identify small letters with high contrast at a specified distance.
Visual acuity measures only the smallest detail we can see; it does not represent the overall quality of vision. 20/30, the smallest letter that they can see at 20 feet could be seen by a normal eye at 30 feet.

In brief: Sharpness of sight
20/20, 20/30, measures of sharpness of sight, ability to identify small letters with high contrast at a specified distance.
Visual acuity measures only the smallest detail we can see; it does not represent the overall quality of vision. 20/30, the smallest letter that they can see at 20 feet could be seen by a normal eye at 30 feet.
Dr. Robert Carroll
Dr. Robert Carroll
Thank
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