As a student you must understand that if it's an a r reading then patient might have 6/6 vision also.secondly you cannot forecast or specify that as per refractory errors how much will be snellen's reading. It may be 6/9or may be6/18 or less even. But normally this much number is likely to be needed for a vision of6/12.
Answered2018-02-25 17:10:41
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