Fig. 4

Correlation of corneal thickness with densitometry score for the anterior layer (a), center layer (b), posterior layer (c), and total depth (d). Densitometry reading for the anterior layer correlates positively with central corneal thickness [correlation coefficient (r) = 0.36, P = 0.003]. No correlation is observed for the center layer (b; r = 0.05, p = 0.87), the posterior layer (c; r = 0.02, p = 0.47), and total depth (d; r = 0.14, P = 0.44), * P < 0.05 by Spearman’s correlation coefficient