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SPH: +6.25D to +10.00D (0.50D steps after +6.50D) and -8.50D to -10.00D (0.50D steps)
CYL: -0.75, -1.25, -1.75, -2.25
AXS: Full circle (5° steps)
SPH: +10.00D to -10.00D (0.50D steps after ±6.50D)
CYL:-2.75 to -5.75 (0.50D steps)