Repeatability and Reproducibility of Noninvasive Keratograph 5M Measurements in Patients with Dry Eye Disease

Table 1

Characteristics of the study population.

Parameters	Healthy ()	Dry eye disease ()	value
Age (year)	38.76 ± 13.18	41.43 ± 15.77	0.403
Gender (male/female)	12/30	14/28	0.637
OSDI (score)	3.74 ± 6.90	30.37 ± 15.11	<0.001
FBUT (s)	9.15 ± 3.51	4.59 ± 1.71	<0.001
Schirmer test (mm/5 min)	15.48 ± 8.68	8.21 ± 5.68	<0.001
Oxford scale	0.00 ± 0.00	1.16 ± 1.54	<0.001
Corneal sensation (mm)	6.07 ± 0.09	5.63 ± 0.47	<0.001
TMH (mm)	0.27 ± 0.12	0.22 ± 0.07	0.02
NIKBUT-first (s)	7.36 ± 3.99	5.57 ± 3.31	0.028
NIKBUT-average (s)	10.35 ± 4.22	8.08 ± 4.08	0.014

FBUT = fluorescein tear breakup time; NIKBUT = noninvasive Kertograph tear breakup time; TMH = tear meniscus height; OSDI = Ocular Surface Disease Index.