Comparison between an Interefrometric Technique and an Auto- Refractometer for Dioptric and Prismatic Power Measurement of Ophthalmic Lenses

Method and materials Testing of trial ophthalmic lenses, spherical and cylindrical, was carried out using an interferometric technique in order to estimate the dioptric and prismatic power of these lenses. The ophthalmic lenses were measured with a laser light, using a Twyman Green interferometer, and interference patterns were acquired and processed, obtaining the dioptric and prismatic power of these lenses. Comparison of the interferometric technique results was conducted with those taken from an Auto-focimeter (TOMEY TL100) in order to check if the two techniques of measurement are interchangeable, and statistical analysis was carried out for both types of measurements.