Table 3. Correlation tables between irregularity of the epithelial thickness, central epithelium thickness, quality of vision (OSI) and best-corrected visual acuity (-LogMar AV).

	Irregularity	Central	-LogMar AV	OSI
Irregularity	1
Central	0.41***	1
-LogMar AV	0.37***	0.28(ns)	1
OSI	0.54***	0.18(ns)	0.71***	1

ns, non-significant;

*** indicate P <0.001 significance.