The Dk project: an interlaboratory comparison of Dk/L measurements

Holden, Brien A., Newton-Howes, Julia, Winterton, Lynn, Fatt, Irving, Hamano, Hikaru, La Hood, Donna, Brennan, Noel A., & Efron, Nathan (1990) The Dk project: an interlaboratory comparison of Dk/L measurements. Optometry and Vision Science, 67(6), pp. 476-481.


The oxygen transmissibilities (Dk/L) of a set of 48 contact lenses made from 8 different materials were measured by 4 laboratories. The L/Dk measurements from each laboratory were compared and correlated. Samples which were not masked with a fixed front surface aperture during measurement were corrected for edge effects. This paper shows that provided L/Dk is calculated for each lens using the same technique and Dk is derived using a graphical method of calculation, similar results can be obtained by all laboratories. However, the agreement was less good for materials of Dk greater than 70 x 10(-11) (cm2/s) (ml O2/ml x mm Hg).

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14 citations in Scopus
5 citations in Web of Science®
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ID Code: 3371
Item Type: Journal Article
Refereed: Yes
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 hypertext link) or contact the author.
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Keywords: Contact Lenses, Oxygen, Comparative Study, Materials Testing, Mathematics, Permeability, Polarography, Regression Analysis
ISSN: 1040-5488
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 Lippincott, Williams and Wilkins
Deposited On: 17 Feb 2006 00:00
Last Modified: 10 Aug 2011 14:42

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