The Schirmer Tear Test (STT) is indicated to measure the rate of tear production. It should be used in the evaluation of
conjunctivitis to diagnose tear deficiency as a contributing factor to ocular surface diseases including: Keratoconjunctivitis
sicca (KCS), pigentary keratitis, indolent corneal ulcers, exposure keratitis, and others. In addition, it should be used to assess
lacrimal gland function prior to cataract surgery.