LENS THICKNESS COMPARISON

RIGHT

LEFT

PD =

SPH

EYE SIZE =

CYL

DEPTH =

AXIS

DBL =

ET/CT =

LENS SHAPE

lens shape image

Double click to change shape

animated lens thickness comparison chart showing lenses with different index numbers

RESULTS

THICKNESS (mm)

% THINNER

INDEX

RIGHT

LEFT

RIGHT

LEFT

Note: The calculator results are estimates only. For minus lens the result is for edge thickness. For plus lens the result is for centre thickness.
For minus stock lens use CT = 1.10. For minus grind lens use CT = 1.90.