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), pigmentary keratitis, indolent corneal ulcers, exposure keratitis, and others. In addition, it should be used to assess lacrimal gland function prior to cataract surgery. • Unique easy-to-read calibrated strips • Conveniently marked for left and right eyes • Blue dye wicks up the scale to improve visibility in measuring tear production