Difference between revisions of Diopters
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==== Spherical Equivalent ==== | ==== Spherical Equivalent ==== | ||
:See also: [[Astigmatism#Spherical | :See also: [[Astigmatism#Spherical equivalent||Astigmatism § Spherical equivalent]] | ||
By calculating the average value over all angles using an integral, the result<ref>it is only necessary to integrate one or two periods: https://www.wolframalpha.com/input/?i=average+of+%28sin+x%29%5E2+from+0+to+2+pi</ref> is | By calculating the average value over all angles using an integral, the result<ref>it is only necessary to integrate one or two periods: https://www.wolframalpha.com/input/?i=average+of+%28sin+x%29%5E2+from+0+to+2+pi</ref> is | ||