Comparison of Invasive & Non-Invasive Tear Break up Time Measurement Techniques in Contact Lens Users

Volume 1 - Issue 4

Hashim Ali Khan¹* and Fatima Iqbal Awan²

Received: June 06, 2018;   Published: June 19, 2018

DOI: 10.32474/TOOAJ.2018.01.000118

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Abstract

Purpose: To compare invasive and non-invasive techniques for measuring tear break-up time (TBUT) in contact lens users.

Methodology: Comparison of invasive and non-invasive TBUT was done on a sample of 30 contact lens users (60eyes) ages limit from 15 to 30 years of females at Department of Ophthalmology, Madinah Teaching Hospital (MTH) Faisalabad by applying non probability convenient sampling technique. This descriptive cross sectional study was completed in duration of 6 months from October 2018 to March; 2018. An appropriate informed consent was taken from each participant under study. Video keratograph and Bausch and Lomb keratometer were used to measure non-invasive tear break up time. Flourescein tear break up time was performed by Slit Lamp using flourscein strip. Averages of three readings were recorded of each technique to ensure accuracy. Data was analyzed by One-way ANOVA test in SPSS software version 20.

Results: There is insignificant difference between invasive and non-invasive TBUT technique at level of 5% confidence interval.

Conclusion: There is no significant difference between values of invasive and non invasive tear break up time. Each of three techniques can be applied for measuring tear film stability.

Keywords: Tear break-up time; TBUT; Invasive; Non-invasive; Keratometer; Video keratograph; Contact lens users

Abstract| Introduction| Materials and Methods| Results| Discussion| Conclusion| References|