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Measures tear film breakup time and location in young men, suggesting patterns in tear film stability.
Tear film breakup time (BUT) and location were determined in 100 young men. BUT ranged from 10 seconds to over 60 seconds. The desiccated locations were randomly distributed over the entire corneal surface, and appeared most often temporally or inferiorly as a dot or a streak.
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Roy H. Rengstorff (1974) studied this question.
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