From: Effects of lid debris debridement combined with meibomian gland expression on the ocular surface MMP-9 levels and clinical outcomes in moderate and severe meibomian gland dysfunction
Parameters
Before treatment
4 weeks after the treatment
P value
MMP-9 levelsa
2.58 (0.20)
1.92 (0.26)
0.029
MMP-9 positivityb
20 (83.3%)
12 (50.0%)
0.014