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Old 22nd Jan 2007, 18:05
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world
 
Join Date: Jul 2006
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If you want to count your astigmatism, divide it by 2.

Example. Somebody with -4 cyl would see similar to one with -2 sph.

Astigmatism (cylinder D is not same as sphere D).
Check out wikipedia.

When are those vision requirements going to relax
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