Based on 2x = .25 Diopters  4x = .50 Diopters  6x = .75 Diopters  8x = 1.00 Diopters

Distance        27"      28"      29"      30"      31"     32"      33"      34"      35"      36"

2X               -.30     -.30     -.31      -.31     -.31     -.31     -.32     -.32      -.32     -.32
4X               -.76     -.78     -.79      -.81     -.82     -.84     -.86     -.88      -.90     -.92
6X              -1.54   -1.61   -1.68    -1.75    -1.83   -1.92   -2.02    -2.13    -2.25   -2.39
8X              -3.18   -3.46   -3.80    -4.20    -4.70   -5.34   -6.18    -7.33    -9.00   -11.68
(NORMAL CLARIFIERS ON THE MARKET RANGE FROM -1.00 TO -3.00 DIOPTERS)

Clarifiers improve distance vision, and reduce your near vision.

Since True Spot Lenses require no dot, clarifiers can be used to clear up the X on targets.
Use the above chart for a reference when ordering Clarifiers.