Influence of Stiles-Crawford apodization on visual acuity

Atchison, David A., Scott, Dion H., Strang, Niall C., & Artal, Pablo (2002) Influence of Stiles-Crawford apodization on visual acuity. Journal of the Optical Society of America A: Optics and Image Science, 19(6), pp. 1073-1083.


The Stiles–Crawford effect (SCE) of the first kind has often been considered to be important to spatial visual performance in that it ameliorates the influence of defocus and aberrations. We investigated the influence of SCE apodization on visual acuity as a function of defocus (out to 62 D) in four subjects. We used optical filters, conjugate with the eye’s entrance pupil, that neutralized or doubled the existing SCE. With an illiterate-E task, the influence of the SCE was more noticeable for myopic defocus than for hypermetropic defocus, was generally more noticeable for high-contrast than for low-contrast letters, and increased with increase in pupil size. The greatest influence on visual acuity of neutralizing the SCE, across the subjects and range of conditions, was deterioration of 0.06 (4-mm pupil), 0.16 (6-mm pupil), and 0.29 log unit (7.6-mm pupil).

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22 citations in Web of Science®
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ID Code: 5466
Item Type: Journal Article
Refereed: Yes
Additional Information: For more information, please refer to the journal's website (see link) or contact the author. Author contact details:
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ISSN: 1520-8532
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
Copyright Owner: Copyright 2002 Optical Society of America
Deposited On: 20 Nov 2006 00:00
Last Modified: 10 Aug 2011 17:39

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