Hi, Please help me out.
On the Snellen's at 3M , 4M and 6M distance.. how large should the 6/9 and 6/6 character in milimeters.
how to calculate and answers please.
Snellen Chart
Hi, Please help me out.
On the Snellen's at 3M , 4M and 6M distance.. how large should the 6/9 and 6/6 character in milimeters.
how to calculate and answers please.
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