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Answer :
Final answer:
The Snellen chart is used to test visual acuity. 20/50 vision means that the person can read letters at a distance of 20 feet that a person with normal vision can read at 50 feet.
Explanation:
The Snellen chart is a standardized arrangement of letters in decreasing size used to test visual acuity. The numbers on the Snellen chart represent the distance at which a person with normal vision can read the letters on that line.
In the case of 20/50 vision, it means that the person can read letters at a distance of 20 feet that a person with normal vision can read at 50 feet.
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