| Reliability of a New Non-invasive Tear Film Break-up Time Measurement Using a Keratograph. |
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Seongyong Jeong, Sang Bumm Lee |
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Department of Ophthalmology, Yeungnam University College of Medicine, Daegu, Korea. sbummlee@ynu.ac.kr |
| 각막지형도를 이용한 새로운 비침습적눈물막파괴시간 검사의 신뢰도 평가 |
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정성용⋅이상범 |
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영남대학교 의과대학 안과학교실 |
Correspondence:
Sang Bumm Lee,
Email: sbummlee@ynu.ac.kr
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Received: 21 April 2016 • Revised: 25 May 2016 • Accepted: 27 June 2016 |
| Abstract |
PURPOSE
To evaluate the repeatability of non-invasive tear film break-up time and identify its relationships with dry eye parameters. METHODS: A total of 100 participants (50 with dry eye, and 50 in the control group) were enrolled prospectively. Non-invasive keratograph first (NIKf-BUT) and average (NIKav-BUT) break-up times were evaluated 2 times using Keratograph 4 (Oculus, Wetzler, Germany), and then tear film break-up time with fluorescein (FBUT) was measured. The correlation analyses were performed between non-invasive parameters (NIKf-BUT and NIKav-BUT) and FBUT. Intra-observer agreements of NIKf-BUT and NIKav-BUT were assessed using intraclass correlation coefficients (ICC). The receiver operating characteristic (ROC) curve technique was used to evaluate the non-invasive method in the diagnosis of dry eye. RESULTS: The correlation analyses revealed positive correlation between NIKav-BUT and FBUT in both groups (dry eye; r = 0.66, p < 0.001 and control group; r = 0.77, p < 0.001). The ICCs of NIKf-BUT and NIKav-BUT were 0.72 and 0.94 in the dry eye, respectively, and 0.70 and 0.91 in the control group. NIKav-BUT was not different from FBUT in either group. The areas under the ROC curves of NIKf-BUT and NIKav-BUT were 0.917 and 0.980, respectively. CONCLUSIONS: The high ICCs verified the repeatability of NIKf-BUT and NIKav-BUT. NIKav-BUT showed no difference from FBUT and positive correlation with FBUT. NIK-BUT showed high diagnostic power and can be considered a new parameter to evaluate dry eye syndrome. |
| Key Words:
Correlation;Dry eye;Keratograph 4;Non-invasive tear film break-up time;Repeatability |
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