Difference between revisions of Optics related math
m add refs section |
m →Visual acuity equation: need to multipy rather than divide by 60 to convert degrees to arcminutes. I think it was just misinterpreting the original on the blog page. |
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==Visual acuity equation== | ==Visual acuity equation== | ||
<math>(\frac{font\ height}{distance\ to\ sign})(\frac{180}{ | <math>(\frac{font\ height}{distance\ to\ sign})(\frac{180}{pi}) \times 60 = arcminutes = a</math> | ||
Note: 5Arcminutes = 20/20 | Note: 5Arcminutes = 20/20 | ||
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With text that we are familiar the brain may clear up that text more than our vision actually operates at.<ref>{{cite jake|https://endmyopia.org/use-math-to-turn-any-text-into-your-own-impromptu-eyechart/}}</ref> | With text that we are familiar the brain may clear up that text more than our vision actually operates at.<ref>{{cite jake|https://endmyopia.org/use-math-to-turn-any-text-into-your-own-impromptu-eyechart/}}</ref> | ||
==Average axial length accomodation/rate of change== | ==Average axial length accomodation/rate of change== | ||
<math>typical\ emmetropic\ eye = 25mm = 25,000\ microns</math> | <math>typical\ emmetropic\ eye = 25mm = 25,000\ microns</math> | ||