Natural (Uncorrected) Vision Speci-Sensi-According to Actual ficity tivity Examination (%) (%) Far Vision Either eye worse than 20/20 99 32 Better eye worse than 20/40 96 58 Better eye worse than 20/1 00 90 78 Near Vision Either eye worse than 20/20 97 44 Better eye worse than 20/40 96 59 Better eye worse than 20/100 91 87 TFar vision: "Without glasses, can you recognize a friend across the street?" Near vision: "Without glasses, can you read ordinary newsprint?"
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R H Gray (1983) studied this question.
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