Experimental validation of a Bayesian model of visual acuity.

Based on standard procedures used in optometry clinics, we compare measurements of visual acuity for 10 subjects (11 eyes tested) in the presence of natural ocular aberrations and different degrees of induced defocus, with the predictions given by a Bayesian model customized with aberrometric data of the eye. The absolute predictions of the model, without any adjustment, show good agreement with the experimental data, in terms of correlation and absolute error. The efficiency of the model is discussed in comparison with image quality metrics and other customized visual process models. An analysis of the importance and customization of each stage of the model is also given; it stresses the potential high predictive power from precise modeling of ocular and neural transfer functions.

[1]  R. Navarro,et al.  Laser Ray Tracing versus Hartmann-Shack sensor for measuring optical aberrations in the human eye. , 2000, Journal of the Optical Society of America. A, Optics, image science, and vision.

[2]  M ANGELES LOSADA.  Aberrations and Relative Efficiency of Light Pencils in the Living Human Eye , 1997, Optometry and vision science : official publication of the American Academy of Optometry.

[3]  Denis G. Pelli,et al.  THE DESIGN OF A NEW LETTER CHART FOR MEASURING CONTRAST SENSITIVITY , 1988 .

[4]  David R Williams,et al.  Neural compensation for the eye's optical aberrations. , 2004, Journal of vision.

[5]  David R Williams,et al.  Neural compensation for the best aberration correction. , 2007, Journal of vision.

[6]  Jason D Marsack,et al.  Three-dimensional relationship between high-order root-mean-square wavefront error, pupil diameter, and aging. , 2007, Journal of the Optical Society of America. A, Optics, image science, and vision.

[7]  R A Applegate,et al.  Parametric representation of Stiles-Crawford functions: normal variation of peak location and directionality. , 1993, Journal of the Optical Society of America. A, Optics and image science.

[8]  Junzhong Liang,et al.  Objective measurement of wave aberrations of the human eye with the use of a Hartmann-Shack wave-front sensor. , 1994, Journal of the Optical Society of America. A, Optics, image science, and vision.

[9]  Larry N Thibos,et al.  Metrics of optical quality derived from wave aberrations predict visual performance. , 2004, Journal of vision.

[10]  Pablo Artal,et al.  Optical quality of the eye in subjects with normal and excellent visual acuity. , 2008, Investigative ophthalmology & visual science.

[11]  Oscar Nestares,et al.  Bayesian model of Snellen visual acuity. , 2003, Journal of the Optical Society of America. A, Optics, image science, and vision.

[12]  Objective refraction from aberrometry: theory. , 2009, Journal of biomedical optics.

[13]  Gunther Wyszecki,et al.  Color Science: Concepts and Methods, Quantitative Data and Formulae, 2nd Edition , 2000 .

[14]  A. Guirao,et al.  A Method to Predict Refractive Errors from Wave Aberration Data , 2003, Optometry and vision science : official publication of the American Academy of Optometry.

[15]  David Williams.  Aliasing in human foveal vision , 1985, Vision Research.

[16]  J. Żabiński.  American National Standards Institute (ANSI) , 2010 .

[17]  A. Bradley,et al.  Statistical variation of aberration structure and image quality in a normal population of healthy eyes. , 2002, Journal of the Optical Society of America. A, Optics, image science, and vision.

[18]  D. Lara-Saucedo,et al.  Aberrations of the Human Eye in Visible and Near Infrared Illumination , 2003, Optometry and vision science : official publication of the American Academy of Optometry.

[19]  G Smith.  Relation between spherical refractive error and visual acuity. , 1991, Optometry and vision science : official publication of the American Academy of Optometry.

[20]  Oscar Nestares,et al.  Efficient spatial-domain implementation of a multiscale image representation based on Gabor functions , 1998, J. Electronic Imaging.

[21]  A. Bradley,et al.  The chromatic eye: a new reduced-eye model of ocular chromatic aberration in humans. , 1992, Applied optics.

[22]  A. Bradley,et al.  Accuracy and precision of objective refraction from wavefront aberrations. , 2004, Journal of vision.

[23]  L N Thibos,et al.  Statistical distribution of foveal transverse chromatic aberration, pupil centration, and angle psi in a population of young adult eyes. , 1995, Journal of the Optical Society of America. A, Optics, image science, and vision.

[24]  A. Watson,et al.  Predicting visual acuity from wavefront aberrations. , 2008, Journal of vision.

[25]  A. Bradley,et al.  Predicting subjective judgment of best focus with objective image quality metrics. , 2004, Journal of vision.

[26]  Juan Campos,et al.  Invariant pattern recognition against defocus based on subband decomposition of the filter , 2000 .

[27]  J. Schwiegerling.  Scaling Zernike expansion coefficients to different pupil sizes. , 2002, Journal of the Optical Society of America. A, Optics, image science, and vision.

[28]  Huanqing Guo,et al.  Changes in through-focus spatial visual performance with adaptive optics correction of monochromatic aberrations , 2008, Vision Research.

[29]  A. Hendrickson,et al.  Human photoreceptor topography , 1990, The Journal of comparative neurology.

[30]  Sowmya Ravikumar,et al.  Calculation of retinal image quality for polychromatic light. , 2008, Journal of the Optical Society of America. A, Optics, image science, and vision.

[31]  David Williams,et al.  Visual performance after correcting the monochromatic and chromatic aberrations of the eye. , 2002, Journal of the Optical Society of America. A, Optics, image science, and vision.

[32]  Chris Dainty,et al.  Use of a customized vision model to analyze the effects of higher-order ocular aberrations and neural filtering on contrast threshold performance. , 2008, Journal of the Optical Society of America. A, Optics, image science, and vision.

[33]  R. Navarro,et al.  Relative contributions of optical and neural limitations to human contrast sensitivity at different luminance levels , 1993, Vision Research.

[34]  D. Williams,et al.  Visibility of interference fringes near the resolution limit. , 1985, Journal of the Optical Society of America. A, Optics and image science.

[35]  P Artal,et al.  Coherent imaging of the cone mosaic in the living human eye. , 1996, Journal of the Optical Society of America. A, Optics, image science, and vision.

[36]  Pablo Artal,et al.  Use of adaptive optics to determine the optimal ocular spherical aberration , 2007, Journal of cataract and refractive surgery.

[37]  Stephen A. Burns,et al.  A new approach to the study of ocular chromatic aberrations , 1999, Vision Research.

[38]  P Simonet,et al.  The Julius F. Neumueller Award in Optics, 1989: change of pupil centration with change of illumination and pupil size. , 1992, Optometry and vision science : official publication of the American Academy of Optometry.

[39]  David R Williams,et al.  Calculated impact of higher-order monochromatic aberrations on retinal image quality in a population of human eyes. , 2002, Journal of the Optical Society of America. A, Optics, image science, and vision.