The contribution of lipid layer movement to tear film thinning and breakup.


PURPOSE To investigate whether the tear film thinning between blinks is caused by evaporation or by tangential flow of the tear film along the surface of the cornea. Tangential flow was studied by measuring the movement of the lipid layer. METHODS Four video recordings of the lipid layer of the tear film were made from 16 normal subjects, with the… (More)
DOI: 10.1167/iovs.08-2459


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