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Hyperopia is predominantly axial in nature

Strang, Niall C., Schmid, Katrina L., & Carney, Leo G. (1998) Hyperopia is predominantly axial in nature. Current Eye Research, 17(4), pp. 380-383.

Abstract

PURPOSE: Myopia has been found to be predominantly axial in nature, i.e. myopic eyes have longer than normal axial lengths, with corneal radius variations having only a small influence on the magnitude of the refractive error. In this study we assess whether a similar relationship exists for hyperopia. METHODS: Biometric data were collected on 57 subjects with either emmetropic or hyperopic refractive errors ranging in magnitude from -0.37 D to +17.25 D. Our main analysis concentrated on subjects with less than +10 D of hyperopia (group 1, n = 53), as subjects with +10 D of hyperopia or more (group 2, n = 4) exhibited marked differences in their biometric characteristics. RESULTS: Analysis of group 1 data revealed a significant relationship (r2 = 0.611, p = 0.0001) between the degree of hyperopia and the measured axial lengths. A weak but statistically significant relationship (r2 = 0.128, p = 0.009) was also found between mean corneal radius measures and mean spherical refractive errors, with the mean corneal radius flattening with increasing hyperopia. In group 2, three of the four subjects exhibited much steeper corneal characteristics than predicted from the group 1 data. CONCLUSIONS: Our results suggest that hyperopia, like myopia, is predominantly axial in nature, although the corneal radius also plays a role in determining refractive error magnitude. These results have implications for refractive surgery and visual performance in hyperopic eyes.

Impact and interest:

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ID Code: 4188
Item Type: Journal Article
Additional URLs:
Keywords: Eye/, pathology, Hyperopia/, pathology, Adolescent, Adult, Biometry, Cornea/pathology, Corneal Topography, Female, Humans, Male, Middle Aged
ISSN: 1460-2202
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 1998 Taylor & Francis
Copyright Statement: First published in Current Eye Research 17(4):pp. 380-383.
Deposited On: 15 Jun 2006
Last Modified: 22 Mar 2012 14:25

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