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What is Tear Break Up Time and Evaluation Tests about?

The document describes two tests used to evaluate the tear film - Tear Break Up Time (TBUT) and tests of basic tear secretion. TBUT measures the time until dry spots appear after a blink, with <10 seconds considered abnormal. Tests of basic secretion involve placing filter paper in the eye to measure wetting over time, with <3 mm after 5 minutes suggesting tear deficiency. The Schirmer test also measures tear volume but can distinguish between basic and reflex tearing.

Author

Nadya Napitupulu

Language

EN