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prelens tear film |
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tear film, prelens Tear film found on the front surface of a contact lens on the eye. The oily layer of the film is slightly thinner with soft lenses than in the precorneal film and almost absent with rigid lenses. The aqueous layer is thinner with rigid lenses than in the precorneal film. The exact composition of the prelens tear film varies with the characteristics of the contact lens on the eye. See precorneal film. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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