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Proceedings Paper

Optical design of a novel instrument that uses the Hartmann-Shack sensor and Zernike polynomials to measure and simulate customized refraction correction surgery outcomes and patient satisfaction
Author(s): Fatima M. M. Yasuoka; Luciana Matos; Antonio Cremasco; Mirian Numajiri; Rafael Marcato; Otavio G. Oliveira; Luis G. Sabino; Jarbas C. Castro N.; Vanderlei S. Bagnato; Luis A. V. Carvalho
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Paper Abstract

An optical system that conjugates the patient’s pupil to the plane of a Hartmann-Shack (HS) wavefront sensor has been simulated using optical design software. And an optical bench prototype is mounted using mechanical eye device, beam splitter, illumination system, lenses, mirrors, mirrored prism, movable mirror, wavefront sensor and camera CCD. The mechanical eye device is used to simulate aberrations of the eye. From this device the rays are emitted and travelled by the beam splitter to the optical system. Some rays fall on the camera CCD and others pass in the optical system and finally reach the sensor. The eye models based on typical in vivo eye aberrations is constructed using the optical design software Zemax. The computer-aided outcomes of each HS images for each case are acquired, and these images are processed using customized techniques. The simulated and real images for low order aberrations are compared using centroid coordinates to assure that the optical system is constructed precisely in order to match the simulated system. Afterwards a simulated version of retinal images is constructed to show how these typical eyes would perceive an optotype positioned 20 ft away. Certain personalized corrections are allowed by eye doctors based on different Zernike polynomial values and the optical images are rendered to the new parameters. Optical images of how that eye would see with or without corrections of certain aberrations are generated in order to allow which aberrations can be corrected and in which degree. The patient can then “personalize” the correction to their own satisfaction. This new approach to wavefront sensing is a promising change in paradigm towards the betterment of the patient-physician relationship.

Paper Details

Date Published: 4 March 2016
PDF: 5 pages
Proc. SPIE 9693, Ophthalmic Technologies XXVI, 96931O (4 March 2016); doi: 10.1117/12.2209232
Show Author Affiliations
Fatima M. M. Yasuoka, Univ. Paulista (Brazil)
Instituto de Física de São Carlos (Brazil)
Wavetek Techonologies Ltda (Brazil)
Luciana Matos, Instituto de Física de São Carlos (Brazil)
Wavetek Techonologies Ltda (Brazil)
Antonio Cremasco, Wavetek Technologies Ltda. (Brazil)
Mirian Numajiri, Wavetek Technologies Ltda. (Brazil)
Rafael Marcato, Wavetek Technologies Ltda. (Brazil)
Otavio G. Oliveira, Mediphacos Ltda. (Brazil)
Luis G. Sabino, Instituto de Física de São Carlos (Brazil)
Jarbas C. Castro N., Instituto de Física de São Carlos (Brazil)
Vanderlei S. Bagnato, Instituto de Física de São Carlos (Brazil)
Luis A. V. Carvalho, Wavetek Technologies Ltda. (Brazil)

Published in SPIE Proceedings Vol. 9693:
Ophthalmic Technologies XXVI
Fabrice Manns; Per G. Söderberg; Arthur Ho, Editor(s)

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