Eye shape and retinal shape, and their relation to peripheral refraction
Verkicharla, Pavan K., Mathur, Ankit, Mallen, Edward A.H., Pope, James M., & Atchison, David A. (2012) Eye shape and retinal shape, and their relation to peripheral refraction. Ophthalmic and Physiological Optics, 32(3), pp. 184-199.
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Purpose: We provide an account of the relationships between eye shape, retinal shape and peripheral refraction.
Recent findings: We discuss how eye and retinal shapes may be described as conicoids, and we describe an axis and section reference system for determining shapes. Explanations are given of how patterns of retinal expansion during the development of myopia may contribute to changing patterns of peripheral refraction, and how pre-existing retinal shape might contribute to the development of myopia. Direct and indirect techniques for determining eye and retinal shape are described, and results are discussed. There is reasonable consistency in the literature of eye length increasing at a greater rate than height and width as the degree of myopia increases, so that eyes may be described as changing from oblate/spherical shapes to prolate shapes. However, one study indicates that the retina itself, while showing the same trend, remains oblate in shape for most eyes (discounting high myopia). Eye shape and retinal shape are not the same and merely describing an eye shape as being prolate or oblate is insufficient without some understanding of the parameters contributing to this; in myopia a prolate eye shape is likely to involve both a steepening retina near the posterior pole combined with a flattening (or a reduction in steepening compared with an emmetrope) away from the pole.
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|Item Type:||Journal Article|
|Keywords:||eye shape, peripheral refraction, retinal shape, conic section|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering|
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Current > Schools > School of Optometry & Vision Science
|Copyright Owner:||Copyright 2012 The College of Optometrists|
|Deposited On:||27 Apr 2012 10:33|
|Last Modified:||28 Apr 2012 17:50|
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