Assessment of the Effect of Wearing a Surgical Face Mask on Tear Film in Normal Eye Subjects

Table 1

The median (IQR) for the SPEED, NITBUT, PRT, and TF scores.

Parameter	beforewearing the mask	After wearing the mask	value
SPEED	0.5 (4.5)	0.1 (1.15)	0.002
NITBUT (s)	15.0 (10.0)	10.0 (16)	<0.001
PRT (mm)	25 (10)	26 (6)	0.398
TF	1.4 (1.0)	1.6 (1.2)	0.198

Significant difference was found before and after wearing a face mask.