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Correlation between Corneal Radius of Curvature and Corneal Eccentricity
Linnaeus University, Faculty of Health and Life Sciences, Department of Medicine and Optometry.
2013 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Aim: The primary aim of this study was to find if there is any correlation between the corneal radius of curvature and its eccentricity.

Method: 45 subjects participated in this study, 24 emmetropes, 18 myopes and three hyperopes. All subjects were free of ocular abnormalities and had no media opacities. All the subjects had normal ocular health and good visual acuity of 1.0 or better for both distance and near. The values for eccentricity and corneal radius of curvature were obtained by using a Topcon CA-100F Corneal Analyzer.

Results: For the 4.5 mm zone the only significant correlation between corneal radius of curvature and eccentricity was obtained for the mean of the meridian (p = 0.007). On the other hand, we found no significant correlation for the average of two meridians or for meridian 1 and meridian 2 separately in the 8.0 mm zone.

Conclusions: We found no correlation between the corneal radius of curvature and the eccentricity for both zones. In addition, no correlation could be found between the spherical equivalent of the refractive errors and the corneal eccentricity. The reason for not finding any significant correlation between the two entities could be due to factors such as smaller sample size and poor distribution of refractive errors in the sample. Moreover, there may be other factors that could influence the overall corneal shape like eye shape, axial length and corneal diameter, which was not evaluated in this study.

Place, publisher, year, edition, pages
2013. , 22 p.
Keyword [en]
corneal radius of curvature, corneal eccentricity, topography, conic sections, corneal shape descriptors
National Category
Medical and Health Sciences
URN: urn:nbn:se:lnu:diva-26486OAI: diva2:628131
Subject / course
Educational program
Optometry Programme, 180 credits
Available from: 2013-07-09 Created: 2013-06-13 Last updated: 2013-07-09Bibliographically approved

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Patrik Fredin(744 kB)912 downloads
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