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Purpose.To determine the intraexaminer repeatability and interexaminer reproducibility of tear meniscus height(TMH)and noninvasive Keratograph tear breakup time(NIKBUT)measurements obtained with the Keratograph 5M(K5M)in a sample of healthy and dry eye populations.Methods.Forty-two patients with dry eye disease(DED group)and 42 healthy subjects(Healthy group),were recruited in this prospective study.In all subjects,the TMH and NIKBUTs(NIKBUT-first and NIKBUT-average)were performed three consecutive measurements with K5M.