QUT ePrints

Combining central and peripheral videokeratoscope maps to investigate total corneal topography

Franklin, Ross J. , Morelande, Mark R., Iskander, D. Robert, Collins, Michael J., & Davis, Brett A. (2006) Combining central and peripheral videokeratoscope maps to investigate total corneal topography. Eye and Contact Lens, 32(1), pp. 27-32.

Abstract

Purpose. To extend the area of standard corneal topography maps, one central map is combined with six peripheral maps after correlating them in a custom written computer program. Methods. The point corresponding to the vertex normal of the central map is found in each of the peripheral maps. Data from the peripheral maps can then be added on to the edges of the central map to create a topography map that extends from limbus to limbus horizontally and vertically. Results. The average size of the combined maps from 15 subjects was 11.3 +/- 0.3 mm horizontally and 10.3 +/- 0.3 mm vertically, compared to 9.2 +/- 0.4 mm horizontally and 7.5 +/- 0.7 mm vertically for the standard single maps. These values represent an increase in surface area of approximately 70%. Conclusions. The topography of the entire cornea can be represented by combining multiple measurements from a Placido videokeratoscope. Conic fits based on central topography data are a poor representation of the total corneal shape.

Impact and interest:

9 citations in Scopus
Search Google Scholar™

Citation countsare sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 2825
Item Type: Journal Article
Additional Information: Self-archiving of the author-version is not yet supported by this publisher. For more information, please refer to the journal’s website (see link) or contact the author. Author contact details: Michael Collins (m.collins@qut.edu.au)
Additional URLs:
Keywords: corneal topography, peripheral cornea, videokeratoscope
ISSN: 1542-233X
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Vision Science (111303)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Optical Technology (111302)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2006 Lippincott Williams & Wilkins
Deposited On: 10 Feb 2006
Last Modified: 29 Feb 2012 23:23

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page