I have recently glazed an bow sight for an archer. His spectacle correction is +0.25/-1.00 x 80. On looking through a pinhole on the bow with the above correction placed at arms length away, the round target appears oval. I have since ammended the lens to +0.50/-050 x 80 but he is still geting the same problem. Any suggestions apart from trial and error of getting him a clear and accurate target, as getting his accuracy up just a notch should get him into the Engalnd squad.
Lewy
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