Tear Buffering in Contact Lens Wearers

Carney, Leo G., Mauger, Thomas F., & Hill, Richard M. (1990) Tear Buffering in Contact Lens Wearers. Acta Ophthalmologica Scandinavica, 68(1), pp. 75-79.


The buffering capacity of tears collected from contact lens wearers was compared to that from non-contact lens wearers. Three groups of subjects were investigated: 6 subjects not wearing contact lenses, 3 subjects wearing rigid contact lenses, and 3 subjects wearing hydrogel contact lenses. Each of the 12 subjects provided, on 6 separate occasions, 100 microliters of tears. The pH of the tears was measured with a closed chamber, temperature stabilized micro-electrode system firstly on collection and then after titration with acid and base. In all, 28 titration steps across the acid-base spectrum were completed for each subject's tears on each occasion. These tear pH responses to acid-base challenge were compared to that of unbuffered distilled water for the same titration procedure. There was no statistically significant effect of contact lens wear on tear buffering capacity, but considerable inter-subject variability was noted.

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1 citations in Web of Science®
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ID Code: 3091
Item Type: Journal Article
Refereed: Yes
Additional Information: For more information, please refer to the journal’s website (see link) or contact the author. Author contact details: l.carney@qut.edu.au
Additional URLs:
Keywords: Contact Lenses, Contact Lenses, Hydrophilic, Tears/, metabolism Adult Buffers Comparative Study Female Humans Hydrogen, Ion Concentration Male Research Support, Non, U, S, Gov't Research Support, U, S, Gov't, P, H, S
ISSN: 1395-3907
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 Blackwell Publishing
Copyright Statement: The definitive version is available at www.blackwell-synergy.com
Deposited On: 20 Jan 2006 00:00
Last Modified: 15 Jan 2009 06:54

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