Corneal shape, volume, and interocular symmetry: parameters to optimize the design of biosynthetic corneal substitutes
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Published version
Author(s)
Durr, GM
Auvinet, E
Ong, J
Meunier, J
Brunette, I
Type
Journal Article
Abstract
PURPOSE: To characterize the three-dimensional (3D) shape, volume distribution, and mirror symmetry of the right and left corneas at the scale of a large population, based on the integrated analysis of 3D corneal shape average maps and topography parameters. METHODS: A total of 7670 Orbscan II corneal topographies from 3835 consenting subjects with no history of ocular disease were studied. Average topography maps were created using the right and left corneal topographies of all subjects. To quantify symmetry, left eye topographies were flipped horizontally into "right eye" topographies and statistics maps were generated, including difference and intraclass correlation coefficient (ICC) maps. RESULTS: The standard deviation of the anterior and posterior average elevation maps in the 3-mm radius central zone of the right and left corneas ranged within ± 8 μm and ± 44 μm, respectively. The ICC maps showed almost perfect interocular agreement for anterior elevation, posterior elevation, and pachymetry (all ICCs > 0.96). All studied shape parameters also showed excellent agreement (ICCs ≥ 0.80). Mirror symmetry was not affected by age, sex, or spherical equivalent. We also showed that this horizontal reflection (flip) of the right and left corneal shapes could not be replaced by a simple rotation. CONCLUSIONS: These results indicate that in normal eyes, the anterior elevation, posterior elevation, and pachymetry of the right and left corneas show remarkable symmetry. This comprehensive analysis was achieved with the purpose of guiding the development of future biosynthetic corneal substitutes.
Date Issued
2015-07
Date Acceptance
2015-04-11
Citation
Investigative Ophthalmology & Visual Science, 2015, 56 (8), pp.4275-4282
ISSN
1552-5783
Publisher
Association for Research in Vision and Ophthalmology (ARVO)
Start Page
4275
End Page
4282
Journal / Book Title
Investigative Ophthalmology & Visual Science
Volume
56
Issue
8
Copyright Statement
© 2015 The Association for Research in Vision and Ophthalmology, Inc
Identifier
PII: 2389249
Subjects
Adolescent
Adult
Aged
Aged, 80 and over
Biometry
Child
Child, Preschool
Cornea
Corneal Diseases
Corneal Topography
Corneal Transplantation
Cross-Sectional Studies
Female
Humans
Imaging, Three-Dimensional
Male
Middle Aged
Organ Size
Prosthesis Design
Reference Values
Young Adult
Ophthalmology & Optometry
11 Medical And Health Sciences
06 Biological Sciences
Publication Status
Published