Table 1. Profile of tear functions in all subjects.

Positive DE symptoms 96 eyes (%)		Negative DE symptoms 146 eyes (%)
BUT ≤ 5 s	77 (80.2)	BUT > 5 s	83 (56.8)
ST value ≤ 5 mm	26 (27.1)※	ST value > 5 mm	81 (68.1)※
VS score ≥ 3 pts	0 (0)	VS score < 3 pts	144 (98.6)
Fulfilled at least one item	80 (83.3)	Fulfilled all items above	46 (31.5)

^※The Schirmer test was performed in 90 and 119 eyes in the subjects with and without DE symptoms, respectively.

BUT, break-up time of tear film; ST, Schirmer test; DE, dry eye; VS, keratoconjunctival vital staining.