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
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- 1Advance Eye Care, Shehzada Market, Jutial, Gilgit, Pakistan
- 2The University of Faisalabad, Sargodha road-1km, Faisalabad, Pakistan
*Corresponding author:
Hashim Ali Khan, Advance Eye Care, Shehzada Market, Jutial, Gilgit, Pakistan
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
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