TEAR FLOW UNDER HYDROGEL CONTACT-LENSES

  • 1 January 1979
    • journal article
    • research article
    • Vol. 18  (4) , 409-413
Abstract
The human tear replenishment rate under 3 different hydrogel lenses was determined with a slit lamp modified to serve as a fluorophotometer. Fractional tear volume replenishment rates under these lenses averaged 0.011/blink, which is significantly lower than the 0.10-0.20/blink reported for rigid lenses. The amount of O2 delivered to the cornea by tear pumping for gel lenses is relatively small and O2 received by the cornea covered by a gel lens comes principally by diffusion through the material.

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