Refraction and Aberration Across the Horizontal Central 10 degrees of the Visual Field
Description
Purpose. The purpose of this study was to measure refraction and aberrations across the horizontal central visual field. Methods. Cycloplegic refraction was measured on eight subjects at 13 points across the horizontal central 10[degrees] of the retina using a Hartmann-Shack wavefront sensor. Refractions were converted into mean sphere (M), 90[degrees] to 180[degrees] astigmatism (J180), and 45[degrees] to 135[degrees] astigmatism (J45) components. For five subjects, higher-order aberrations were determined at the center and edges of the field. Results. Subtle changes in refraction were found to exist across the central 10[degrees] of the retina, with changes in mean best sphere varying by up to half a diopter across this region and with smaller changes in astigmatism. Horizontal coma, but no other higher-order aberrations, varied systemically across the visual field; it varied linearly with angle but at different rates for the different subjects. Conclusion. Subtle changes in cycloplegic refraction exist across the horizontal central 10[degrees] of the retina. The results indicate the need for correct alignment when measuring objective refraction.
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ID Code: | 225039 | ||
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Item Type: | Contribution to Journal (Journal Article) | ||
Refereed: | Yes | ||
ORCID iD: |
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Measurements or Duration: | 9 pages | ||
Keywords: | Aberrations, Astigmatic Decomposition, Peripheral Refraction, Visual Field | ||
DOI: | 10.1097/01.opx.0000214382.75847.c4 | ||
ISSN: | 1040-5488 | ||
Pure ID: | 33873285 | ||
Divisions: | Past > QUT Faculties & Divisions > Faculty of Health Past > Institutes > Institute of Health and Biomedical Innovation Current > Schools > School of Optometry & Vision Science |
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Copyright Owner: | Consult author(s) regarding copyright matters | ||
Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au | ||
Deposited On: | 06 Nov 2021 20:53 | ||
Last Modified: | 03 Mar 2024 15:49 |
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