Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

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Intrasession repeatability of the tear film break-up time measurements provided by the Sirius system

Poster Details

First Author: R. PĂ©rez CambrodĂ­ SPAIN

Co Author(s):    D. Pinero Llorens   J. Ruiz Fortes   R. Soto Negro   C. Jimanez Benito   A. Artola Roig        

Abstract Details


To evaluate the intrasession repeatability of the break-up time (BUT) measurements using the Sirius Scheimpflug photography-based system


Oftalmar. Vithas Hospital Internacional Medimar. Alicante, Spain. Department of Optics, Anatomy and Pharmacology. University of Alicante, Spain


The sample included 22 eyes of 22 patients (15 female and 7 male) with a mean age of 35.3+/-11.6 years (range 19 to 55 years). Mean sphere was -2.50+/-3.51 D and mean cylinder was -0.73+/-0.66 D. Examinations were performed using the specific Tear Analysis module of the Sirius system. Three consecutive measurements were obtained with this device to assess the intrasession repeatability of the device.


Mean time at which the first tear break-up time occurred (BUT1) was 9.02+/-4.55 seconds; second measure 8.31+/-4.84, third measure 8.62+/-5.09. Mean average break-up time (AvgBUT) that included the whole cornea, was; 10.71+/-3.17 (first measure), 10.83+/-3.31 (second measure), and 10.45+/-3.43 (third measure). The mean Sw (intrasession standard deviation) was for BUT1 2.72+/-2.07 and for AvgBUT 1.67+/-1.29. Mean coefficient on repeatability (1.96*Sw) was for BUT1 5.32+/-4.05 and for AvgBUT 3.27+/-2.53. Intraclass correlation coefficient was for BUT1 0.739 and 0.801 for AvgBUT


The Tear Analysis module of the Sirius device provides consistent measurements of the tear break-up time (BUT)

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