Methodology for determining the intrinsic oxygen permeability of contact lens materials

Brennan, Noel A., Efron, Nathan, & Holden, Brien A. (1987) Methodology for determining the intrinsic oxygen permeability of contact lens materials. Clinical and Experimental Optometry, 70(2), pp. 42-45.


Present techniques for the mathematical manipulation of data obtained from measurements of oxygen transmissibility of contact lenses incorrectly assume that all oxygen flow occurs perpendicularly to the surface of the sensor cathode. Lateral diffusion of oxygen from the lens surface outside the cathode area (the so-called 'edge effect'), will serve to reduce the total effective resistance to oxygen flow, resulting in an overestimation of the permeability of the lens material. We describe here a new empirical method of analysis that accounts for the edge effect and demonstrate how it may be used to determine the intrinsic permeability of contact lens materials.

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ID Code: 10920
Item Type: Journal Article
Refereed: Yes
Additional Information: The contents of this journal from 1998 to 2005 can be freely accessed online via the journal’s web page (see link).
Additional URLs:
Keywords: Contact lens, oxygen transmissibility, intrinsic oxygen permeability, edge effect, surface effects
ISSN: 0816-4622
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Divisions: Current > Research Centres > Centre for Health Research
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 1987 Optometrists Association Australia
Deposited On: 27 Nov 2007 00:00
Last Modified: 10 Aug 2011 14:42

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