Oxygen Tension Under a Hard, Gas-Permeable Contact Lens
- 1 March 1977
- journal article
- Published by Wolters Kluwer Health in Optometry and Vision Science
- Vol. 54 (3) , 146-148
- https://doi.org/10.1097/00006324-197703000-00004
Abstract
Oxygen tension under a hard, gas-permeable contact lens is calculated. The gas permeability of the lens is taken from the engineering literature and is shown to be 10 times smaller than claimed in the optometric literature. The engineering data are supported by new measurements of gas permeability. Calculations using the new data show that the oxygen tension under the lens is at the lower end of the range of acceptable values.Keywords
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