SPH: +6.00D to -9.00D (0.50D steps after -6.00D and +5.00D)
CYL: -0.75, -1.25, -1.75, -2.25
AXS: Full circle (10° steps)
To be discontinued May 2026.
Design Notes
Stabilization
Prism ballast with a wide ballast band and uniform horizontal ballast thickness, on a smooth continuous surface with no junction between the ballast and the optic.