Comparison of three techniques in measuring progressive addition lenses.

Purpose: To measure progressive addition lenses (PALs) by three techniques and to compare the differences across techniques.

Methods: Five contemporary PALs (Varilux Comfort Enhanced, Varilux Physio Enhanced, Hoya Lifestyle, Shamir Autograph, and Zeiss individual) with plano distance power and a +2.00 diopters (D) add were evaluated under the condition of lateral displacement of the lens (no rotation and no tilt) using three methods.