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Proceedings Paper

Power measuring in ophthalmic lenses using lateral amplification
Author(s): Paloma G. Mendoza-Villegas; Gerardo Trujillo-Schiaffino; Didia P. Salas-Peimbert; Marcelino Anguiano-Morales; Luis F. Corral-Martinez
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Paper Abstract

Nowadays refractive errors in the human eye affect approximately 10% of world’s population, decreasing vision acuity and life quality. However a simple common solution is the use of an adequate ophthalmic lens. Due to the importance of ophthalmic lenses, the best measurement equipment is required for testing, these days experimental and commercial apparatus are available but with the possibility of improvement. We present a method to measure spherical and cylindrical power in ophthalmic lenses. The system uses an equation obtained from lateral amplification concept and Gauss formula to make calculations. Also an experimental setup is presented for the measurement of ophthalmic lens from -20 diopters to 20 diopters in the case of spherical lenses, and from -6 diopters to 6 diopters in the case of cylindrical lenses. The setup contains a reference object, the lens to be tested and a digital camera connected to a computer with software designed in LabVIEW for the data processing. Satisfactory preliminary results were obtained according to ISO 8598.

Paper Details

Date Published: 18 November 2013
PDF: 6 pages
Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 8785CZ (18 November 2013); doi: 10.1117/12.2022242
Show Author Affiliations
Paloma G. Mendoza-Villegas, Instituto Technologico de Chihuahua (Mexico)
Gerardo Trujillo-Schiaffino, Instituto Technologico de Chihuahua (Mexico)
Didia P. Salas-Peimbert, Instituto Technologico de Chihuahua (Mexico)
Marcelino Anguiano-Morales, Instituto Technologico de Chihuahua (Mexico)
Luis F. Corral-Martinez, Instituto Technologico de Chihuahua (Mexico)


Published in SPIE Proceedings Vol. 8785:
8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications
Manuel Filipe P. C. Martins Costa, Editor(s)

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