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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 22, Iss. 12 — Dec. 1, 2005
  • pp: 2589–2597

Influences of reference plane and direction of measurement on eye aberration measurement

David A. Atchison and W. Neil Charman  »View Author Affiliations


JOSA A, Vol. 22, Issue 12, pp. 2589-2597 (2005)
http://dx.doi.org/10.1364/JOSAA.22.002589


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Abstract

We explored effects of measurement conditions on wave aberration estimates for uncorrected, axially myopic model eyes. Wave aberrations were initially referenced to either the anterior corneal pole or the natural entrance pupil of symmetrical eye models, with rays traced into the eye from infinity (into the eye) to simulate normal vision, into the eye from infinity and then back out of the eye from the retinal intercepts (into/out of the eye), or out of the eye from the retinal fovea (out of the eye). The into-the-eye and out-of-the-eye ray traces gave increases in spherical aberration as myopia increased, but the into/out-of-the-eye ray trace showed little variation in spherical aberration. Reference plane choice also affected spherical aberration. Corresponding residual aberrations were calculated after the models had been optically corrected, either by placing the object or image plane at the paraxial far point or by modifying corneas to simulate laser ablation corrections. Correcting aberrations by ablation was more complete if the original aberrations were referenced to the cornea rather than to the entrance pupil. For eyes corrected by spectacle lenses, failure to allow for effects of pupil magnification on apparent entrance pupil diameter produced larger changes in measured aberrations. The general findings regarding choice of reference plane and direction of measurement were found to be equally applicable to eyes that lacked rotational symmetry.

© 2005 Optical Society of America

OCIS Codes
(080.1010) Geometric optics : Aberrations (global)
(080.2710) Geometric optics : Inhomogeneous optical media
(330.4460) Vision, color, and visual optics : Ophthalmic optics and devices

ToC Category:
Vision and color

History
Original Manuscript: January 31, 2005
Revised Manuscript: April 18, 2005
Manuscript Accepted: May 16, 2005
Published: December 1, 2005

Virtual Issues
Vol. 1, Iss. 1 Virtual Journal for Biomedical Optics

Citation
David A. Atchison and W. Neil Charman, "Influences of reference plane and direction of measurement on eye aberration measurement," J. Opt. Soc. Am. A 22, 2589-2597 (2005)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-22-12-2589


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