The Schirmer Tear Test is used to measure the rate of tear production. It should be used to evaluate and diagnose tear deficiency as a contributing factor to diseases that occur on the surface of the eye including: Keratoconjunctivitis sicca (KCS)， pigmentary keratitis， corneal ulcers， exposure keratitis， and others. It can also be used to evaluate tear duct function prior to eye surgery. This test comes as easy-to-read calibrated strips marked for left and right eyes.

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