Testing soft contact lenses with a moire deflectometer

Kathi Kreske; Eliezer Keren; Yaacov Zac; Franck Nabeth; Amiadav Livnat

doi:10.1117/12.151125

13 August 1993 Testing soft contact lenses with a moire deflectometer

Kathi Kreske, Eliezer Keren, Yaacov Zac, Franck Nabeth, Amiadav Livnat

Proceedings Volume 1972, 8th Meeting on Optical Engineering in Israel: Optoelectronics and Applications in Industry and Medicine; (1993) https://doi.org/10.1117/12.151125
Event: 8th Meeting in Israel on Optical Engineering, 1992, Tel Aviv, Israel

Abstract

Since the advent of soft contact lenses, no solution had been found for accurately and easily testing these lenses. The same systems that had been used for testing dry lenses were applied. This resulted in difficult training of each operator in properly drying the lens, and then quickly testing it before it dried too much causing large power changes. Lenses were not tested in solution because the decreased accuracy caused by the refractive index of the solution was much lower than what was allowable. With the moire deflectometer, a new method has been developed for testing soft lenses in their saline solution, with a much higher accuracy than what is required by the market. In addition, the moire deflectometer allows the quantitative testing of lens quality, and a straight forward method for testing toric lenses. Multi focal lenses can also be analyzed and tested.

Citation Download Citation

Kathi Kreske, Eliezer Keren, Yaacov Zac, Franck Nabeth, and Amiadav Livnat "Testing soft contact lenses with a moire deflectometer", Proc. SPIE 1972, 8th Meeting on Optical Engineering in Israel: Optoelectronics and Applications in Industry and Medicine, (13 August 1993); https://doi.org/10.1117/12.151125

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