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Proceedings Article

PSF and MTF analysis of the visual performance in undilated Mexican normal virgin whole eyes (UCVA greater than or equal to 20/20, 20/30, and 20/40)

[+] Author Affiliations
Eduardo Tepichin, Sabino Chavez-Cerda, David Sanchez-de-la-Llave

Instituto Nacional de Astrofisica Optica y Electronica (Mexico)

Roberto Cantu, Victor Montes, Julio Bonilla

Correccion Visual con Laser (Mexico)

Marco A. Rosales

Instituto Nacional de Astrofisica Optica y Electronica (Mexico) and Univ. de las Americas Puebla (Mexico)

Andree Curioca

Univ. de las Americas Puebla (Mexico)

Proc. SPIE 5688, Ophthalmic Technologies XV, 9 (May 02, 2005); doi:10.1117/12.591851
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From Conference Volume 5688

  • Ophthalmic Technologies XV
  • Fabrice Manns; Per G. Soederberg; Arthur Ho; Bruce E. Stuck; Michael Belkin
  • San Jose, CA | January 22, 2005

abstract

In the area of ophthalmic refractive surgery research, the Zernike expansion of the Wavefront aberrations has been the key factor in the measurement, representation and evaluation of the human eye aberrations in many different clinical situations. The Wavefront Aberrations described by the Zernike expansion can be translated as the polynomial expansion of the exit pupil of an optical system that represents the total Wavefront aberrations (corneal + internal elements) of the eye. In this direction, we can use this exit pupil to calculate both the incoherent Point Spread Function (PSF) and the Optical Transfer Function (OTF) of this system. With either of these two functions (PSF or OTF), we can easily calculate the output image of a certain object. This information can be used to evaluate the visual performance of the eyes with a set of pre-determined objects and their corresponding images. We apply these results to characterize the behavior of the aberrations of human eyes that in principle do not need any type of refractive compensation or correction, in order to have a reference which may be ethnical-dependent. We are interested in describing the set of aberration characterizing the Normal Mexican Eye (NME). To achieve our goal, we start our study with a group of Mexican Males with an Uncorrected Visual Acuity (UCVA) of 20/20, 20/30, and 20/40. We present the preliminary results of our characterization.

© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Eduardo Tepichin ; Roberto Cantu ; Marco A. Rosales ; Sabino Chavez-Cerda ; David Sanchez-de-la-Llave, et al.
"PSF and MTF analysis of the visual performance in undilated Mexican normal virgin whole eyes (UCVA greater than or equal to 20/20, 20/30, and 20/40)", Proc. SPIE 5688, Ophthalmic Technologies XV, 9 (May 02, 2005); doi:10.1117/12.591851; http://dx.doi.org/10.1117/12.591851


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