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Decentred optical axes and aberrations along principal visual field meridians

Charman, W. Neil & Atchison, David A. (2009) Decentred optical axes and aberrations along principal visual field meridians. Vision Research, 49(14), pp. 1869-1876.

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Abstract

Suggestions that peripheral imagery may affect the development of refractive error have led to interest in the variation in refraction and aberration across the visual field. It is shown that, if the optical system of the eye is rotationally symmetric about an optical axis which does not coincide with the visual axis, measurements of refraction and aberration made along the horizontal and vertical meridians of the visual field will show asymmetry about the visual axis. The departures from symmetry are modelled for second-order aberrations, refractive components and third-order coma. These theoretical results are compared with practical measurements from the literature. The experimental data support the concept that departures from symmetry about the visual axis in the measurements of crossed-cylinder astigmatism J45 and J180 are largely explicable in terms of a decentred optical axis. Measurements of the mean sphere M suggest, however, that the retinal curvature must differ in the horizontal and vertical meridians.

Impact and interest:

17 citations in Scopus
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16 citations in Web of Science®

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ID Code: 29543
Item Type: Journal Article
Additional URLs:
Keywords: Aberrations, Asymmetry, Astigmatism, Optical axis, Peripheral refraction, Visual Field
DOI: 10.1016/j.visres.2009.04.024
ISSN: 0042-6989
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Vision Science (111303)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Copyright Owner: Copyright 2009 Elsevier
Copyright Statement: Author's Personal copy
Deposited On: 08 Jan 2010 11:02
Last Modified: 01 Mar 2012 00:08

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