The thickness of the tear film.
Measurements of the thickness of the pre-corneal tear film, pre-lens tear film, post-lens tear film, and the lipid layer on the surface of the tear film are summarized. Spatial and temporal variations in tear film thickness are described. Theoretical predictions of tear film thickness are discussed. Mechanisms involved in the upward drift of the tear film after a blink, and in the formation of dry spots, are considered.
King-Smith
P Ewen
PE
College of Optometry, The Ohio State University, Columbus, Ohio 43218-2342, USA. King-Smith.1@osu.edu
Fink
Barbara A
BA
Hill
Richard M
RM
Koelling
Kurt W
KW
Tiffany
John M
JM
D000818:Animals; D003228:Conjunctiva / Q000502:physiology; D003261:Contact Lenses; D015352:Dry Eye Syndromes / Q000378:metabolism; D006801:Humans; D050356:Lipid Metabolism; D013666:Tears / Q000737:chemistry* / Q000502:physiology*