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Corneal Oxygenation: Blink Frequency as a Variable in Rigid Contact Lens Wear

Fink, Barbara A., Hill, Robert M., & Carney, Leo G. (1990) Corneal Oxygenation: Blink Frequency as a Variable in Rigid Contact Lens Wear. The British Journal of Ophthalmology, 74(3), pp. 168-171.

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Abstract

Using a micropolarographic system, we measured the responses of six human corneas to nine oxygen exposure conditions: to air (continuous open-eye) with no contact lens in place, and to eight interblink intervals (1, 2, 3, 4, 5, 6, 7, and 300 s durations) with an oxygen impermeable lens in place. The corneal oxygen uptake rates immediately following each of those conditions were direct indices of tear bulk-flow exchange under a rigid contact lens as an oxygen route. Greatest efficiencies in reducing corneal oxygen demand were associated with the two highest blink frequencies examined (namely, for interblink intervals of 2 s or less). Even at those frequencies oxygen demands ranging from 4 to 6 times the open-eye, non-wearing, baseline rate for each eye typically occurred, clearly justifying the need for a supplementary oxygenation route, for example, directly through rigid contact lens materials having inherently high oxygen permeabilities.

Impact and interest:

4 citations in Scopus
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3 citations in Web of Science®

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189 since deposited on 15 Sep 2006
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ID Code: 3105
Item Type: Journal Article
Keywords: Blinking, Contact Lenses, Cornea/, metabolism, Oxygen/, metabolism, Adult, Female, Humans, Male, Research Support, U, S, Gov't, P, H, S, Time Factors
DOI: 10.1136/bjo.74.3.168
ISSN: 0007-1161
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 1990 BMJ Publishing Group
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 15 Sep 2006
Last Modified: 09 Jun 2010 22:29

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