Cornea - ARVO

ARVO 2013 Annual Meeting Abstracts by Scientific Section/Group - CorneaMateo, None; Jose M. Herreras, None; Michael E. Stern, Allergan,Inc. (E); Maria J. Gonzalez-Garcia, NoneSupport: The present study was partially supported by (1) Junta deCastilla y León: VA145A11-2 and 04/09/VA/0158; (2) University ofValladolid FPI-UVa-2008; (3) Ministry of Economy andCompetence: PTQ-09-02-01913, CDTI: IDI-20060676, CICYT:SAF2010-15361.Program Number: 937 Poster Board Number: B0242Presentation Time: 1:00 PM - 2:45 PMReproducibility of tearfilm osmolarity measurement assessedwith electrical impedance in patients with dry eye syndrome andhealthy subjectsGerhard Garhofer 1 , Semira Kaya 1 , Johannes Nepp 2 , DoreenSchmidl 1 , Leopold Schmetterer 1, 3 . 1 Department of ClinicalPharmacology, Medical University of Vienna, Vienna, Austria;2 Department of Ophthalmology, Medical University of Vienna,Austria, Austria; 3 Department of Biomedical Engineering andPhysics, Medical University of Vienna, Austria, Austria.Purpose: Dry Eye Syndrome (DES) is a common medial conditionthat affects up to 20% of adults aged 45 years or older. Standardclinical tests are limited by their poor reproducibility and show only aweak correlation to patients complains. It has been hypothesized thatmeasurement of tear film osmolarity may be a new and promisingnon-invasive approach for the diagnosis and monitoring of treatmentsuccess. The current study investigated the short time and day-to-dayreproducibility of the Tear Lab Osmolarity system.Methods: 20 patients with DES and 20 age and sex matchedvolunteers were included in this study. Tear film osmolarity wasmeasured in both groups on three consecutive study days to calculateday-to-day reproducibility. To assess short time reproducibility ofosmolarity measurements were taken 3 times per study day. Tear filmbreak up time (BUT) and Schirmer 1 test were assessed by standardclinical tests. Coefficient of variation was calculated as a measure ofreproducibility.Results: Schirmer test and BUT was lower in patients with DEScompared to healthy subjects on all three study days (p