Hey folks!
I'm not sure how I have never, ever noticed it but now as I'm looking at the ANSI Z80.1 2015 tolerance I noticed that the Sphere tolerance is based on Sphere Meridian Power (Minus Cylinder Convention). Does this mean that I don't have to find and use the power at Meridian of Highest Absolute Power to see which tolerance I need to use? If I'm reading it correctly, as long as the Rx is minus cylinder form I can just use the Sph power (whether its more or less than +/- 6.50) to determine which tolerance to use. Is that right?
Much appreciated!
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