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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Vol. 16, Iss. 8 — Aug. 1, 1999
  • pp: 1881–1891

Off-axis aberrations of a wide-angle schematic eye model

Isabel Escudero-Sanz and Rafael Navarro  »View Author Affiliations

JOSA A, Vol. 16, Issue 8, pp. 1881-1891 (1999)

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A schematic eye model based on anatomical data, which had been previously designed to reproduce image quality on axis, has been transformed into a wide-angle model by simply adding a spherical image surface that plays the role of the retina. This model captures the main features of the wide-angle optical design of the human eye with minimum complexity: four conic optical surfaces plus a spherical image surface. Seidel aberrations (spherical aberration, coma, astigmatism, field curvature, and distortion), longitudinal and transverse chromatic aberrations, and overall monochromatic spot diagrams have been computed for this eye model and for field angles ranging from 0° to 60° by both finite and third-order ray tracing. The modulation transfer function for each field angle has been computed as well. In each case our results have been compared with average experimental data found in the literature, showing a reasonably good agreement. The agreement between the model and experimental data is better off axis, mainly at moderate (10°–40°) field angles, than on axis. The model has been applied to simulate a variety of experimental methods in which image aberrations are estimated from measurements taken in the object space. Our results suggest that for some types of aberration, these methods may yield biased estimates.

© 1999 Optical Society of America

OCIS Codes
(080.3630) Geometric optics : Lenses
(330.4060) Vision, color, and visual optics : Vision modeling
(330.5370) Vision, color, and visual optics : Physiological optics

Original Manuscript: November 16, 1998
Revised Manuscript: March 15, 1999
Manuscript Accepted: March 15, 1999
Published: August 1, 1999

Isabel Escudero-Sanz and Rafael Navarro, "Off-axis aberrations of a wide-angle schematic eye model," J. Opt. Soc. Am. A 16, 1881-1891 (1999)

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