A review of the theoretical concepts, measurement systems and application of contact lens oxygen permeability
Brennan, Noel A. , Efron, Nathan, Holden, Brien A. , & Fatt, Irving (1987) A review of the theoretical concepts, measurement systems and application of contact lens oxygen permeability. Ophthalmic and Physiological Optics, 7(4), pp. 485-490.
The interest in rigid gas-permeable contact lenses for extended wear has promoted a re-evaluation of the theoretical and practical aspects of the oxygen transport characteristics of contact lens materials. Oxygen permeability has been considered by some authors to be a parameter which is dependent upon the measurement conditions; however, this paper demonstrates that an intrinsic permeability coefficient may be derived for a given material when the basic principles of the transport mechanisms are considered. Two basic methodologies have been described for measuring oxygen permeability--dual-chamber and electrochemical methods, the latter being the more popular. Although consistency in measured oxygen transmissibility of a given lens may be achieved among laboratories, current analytical techniques do not allow the intrinsic permeability coefficient of materials to be determined. Future research should be directed towards developing methods to fully correct for surface and edge effects, and to achieve standardization among laboratories.
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|Item Type:||Journal Article|
|Additional Information:||For more information, please refer to the journal's website (see link) or contact the author. Author contact details: email@example.com|
|Keywords:||Contact Lenses, Oxygen, Mathematics, Methods, Permeability|
|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 1987 Elsevier|
|Deposited On:||08 Feb 2006|
|Last Modified:||11 Aug 2011 00:42|
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