Oxygen tension measurements under soft contact lenses with blinking
The levels of oxygen beneath a contact lens for the maintenance of normal coorneal function has been a subject of some concern over the past decade. The proper functioning of rigid PMMA contact lenses has been shown theoretically and experimentally to depend on an adequeate tear exchange mechanism. OUr knowledge of such mechanisms with soft contact lens wear has been basically limited to mathematical predictions and models. Experimetal evidence of tear exchange is limited to the observations of Carter, who reported the presence of tear flow under soft contact lenses by observing the movement of blood cells taht had been added to the subjects tears. A preliminary study by Decker et al,10 with a high molecular weight flouroscein technique, demonstrated that a small amount of tear fluid movement and exchange occures during blinking. the authiors suggested, however, that such mechanisms probably contribute little to the oxygen supply under the lens. A recently described technique for measuring the equivalent oxygen tension at the anterior corneal surface of the in vivo human eye was used to investigate the role of blinking in the supply of oxygen to the cornea beneath soft contact lenses.
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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|
|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 1979 Elsevier|
|Deposited On:||31 Jan 2006|
|Last Modified:||15 Jan 2009 16:54|
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