Tear turnover rate is reduced in patients with symptomatic dry eye

PURPOSE: Tear turnover rate (TTR) is defined as the percent decrease of fluorescein concentration in the tears per minute after the instillation of fluorescein. The purpose of this study was to examine differences in TTR in a sample with symptoms of dry eye and an asymptomatic control sample using the Fluorotron Master Fluorophotometer. METHODS: TTR was measured using the OcuMetrics Fluorotron Master. It measures the decay of the fluorescence …