Accurate method for measuring oblique astigmatism and oblique power of ophthalmic lenses

摘要

Abstract: The measurement of oblique astigmatism error and its oblique power of ophthalmic lens under identical conditions of the human visual system - such as the distance from the center rotation of the eye to the back vertex surface of the lens - viewing distance, and lens aperture using a Mach Zehnder interferometer is describe.!6