If you are choosing standard lenses for short sighted peopleIf you are choosing standard lenses for short sighted people,I would recommend you follow the following formula;
Your Sph prescription + 0.5 x Your Cyl prescription
My prescription is Sph= -2.75, Cyl= -1.00
By calculation I would need -3.25 and I chose -3.00 and the vision is very good underwater, as good if not better than my day spectacles.
Recommend to a friend? Yes
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