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SPH: +6.00D to -8.00D (0.50D steps after -6.50D)
ADD: +1.00, +1.50, +2.00, +2.50
Extended parameters available in XR.
Use the OptiExpert Calculator or follow the guide below:
To improve distance vision add +/-0.25D (up to +/-0.50D) to the eye that needs improvement. To improve near vision add +/-0.25D (up to +/-0.50D) to the eye that needs improvement.