Dear Otis,
I have been reading messages in the groups. I read the Nbab
(or something similar) post. He says he has 20/40 but then he states he
measured this from 9 feet using a yard stick?

Surely this means he has a greater prescription than he has stated from 20
feet? Something in the area of 20/80 (double the distance double the second
number)


Thanks

Morgan


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