Effect of accommodation on peripheral ocular aberrations

Mathur, Ankit, Atchison, David A., & Charman, W. Neil (2009) Effect of accommodation on peripheral ocular aberrations. Journal of Vision, 9(12[20]), pp. 1-11.

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Abstract

Changes in peripheral aberrations, particularly higher-order aberrations, as a function of accommodation have received little attention. Wavefront aberrations were measured for the right eyes of 9 young adult emmetropes at 38 field positions in the central 42 x 32 degrees of the visual field. Subjects accommodated monocularly to targets at vergences of either 0.3 or 4.0 D. Wavefront data for a 5 mm diameter pupil were analyzed either in terms of the vector components of refraction or Zernike coefficients and total RMS wavefront aberrations. Relative peripheral refractive error (RPRE) was myopic at both accommodation demands and showed only a slight, not statistically significant, hypermetropic shift in the vertical meridian with the higher accommodation demand. There was little change in the astigmatic components of refraction or the higher-order Zernike coefficients, apart from fourth-order spherical aberration which became more negative (by 0.10 µm) at all field locations. Although it has been suggested that nearwork and the state of peripheral refraction may play some role in myopia development, for most of our adult emmetropes any changes with accommodation in RPRE and aberration were small. Hence it seems unlikely that such changes can be of importance to late-onset myopisation.

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ID Code: 46583
Item Type: Journal Article
Refereed: Yes
Keywords: emmetropia, peripheral aberrations, peripheral refraction, accommodation
DOI: 10.1167/9.12.20
ISSN: 1534-7362
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
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 © 2011 by the Association for Research in Vision and Ophthalmology
Deposited On: 23 Oct 2011 22:05
Last Modified: 08 Dec 2015 01:35

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