QUT ePrints

On the etiology of keratocyte loss during contact lens wear

Kallinikos, Panagiotis & Efron, Nathan (2004) On the etiology of keratocyte loss during contact lens wear. Investigative Ophthalmology and Visual Science, 45(9), pp. 3011-3020.

View at publisher

Abstract

PURPOSE: To employ confocal microscopy to investigate the etiology of keratocyte loss after short-term contact lens wear by monitoring quantitative changes in keratocyte density. METHODS: Twenty neophyte subjects aged 26 +/- 3 years participated in the study, which was conducted over the course of three experimental sessions. In the first session, one eye of each subject was fitted with a silicone hydrogel contact lens, and the other eye served as the control. Both corneas were exposed to an anoxic environment for 2 hours. Ultrasound pachometry and confocal microscopy were performed on both eyes at baseline, immediately after the experiment and 2 hours post experiment. This procedure was repeated after 72 hours, but in this case one eye of each subject was fitted with a hyper-Dk rigid contact lens, and the fellow eye served again as the control. In the third experimental session, each subject was asked to periodically rub one eye only. Tear samples collected from the rubbed and control eyes were assayed for epidermal growth factor (EGF), hepatocyte growth factor (HGF), and interleukin (IL)-8. RESULTS: The increase in corneal thickness was similar in the experimental and control eyes. Both anterior and posterior keratocyte densities decreased in the experimental eyes compared with the control eyes, in all sessions. EGF and IL-8 concentrations were increased in the rubbed eyes compared with the control eyes. CONCLUSIONS: It is hypothesized that the mechanical stimulation of the corneal surface, due to the physical presence of a contact lens, induces the release of inflammatory mediators that cause keratocyte dysgenesis or apoptosis.

Impact and interest:

43 citations in Scopus
Search Google Scholar™
37 citations in Web of Science®

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: 7972
Item Type: Journal Article
Additional Information: For more information, please refer to the publisher's website (link above) or contact the author: n.efron@qut.edu.au
Additional URLs:
Keywords: Cornea, contact lens, keratocytes, mechanical effect
DOI: 10.1167/iovs.04-0129
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Optometry and Ophthalmology not elsewhere classified (111399)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Association for Research in Vision and Ophthalmology
Deposited On: 06 Jun 2007
Last Modified: 29 Feb 2012 23:29

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page