Table 6 Coefficient of precision (CP), coefficient of repeatability (CR) and coefficient of variation for the manual measures of NIBUT performed by observer 1 and observer 2 in the first session (test) and in second session (retest).

From: Comparing automated and manual assessments of tear break-up time using different non-invasive devices and a fluorescein procedure

 

Observer 1

Observer 2

Test

CP = 1.68 s; CR = 2.37 s; CV = 0.11

CP = 1.71 s; CR = 2.41 s; CV = 0.13

Retest

CP = 1.31 s; CR = 1.85 s; CV = 0.10

CP = 1.32 s; CR = 1.87 s; CV = 0.11

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