Fig. 6

Scatterplot showing no significant correlation between logMAR best corrected visual acuity and corneal densitometry (a) central 2 mm (Spearman correlation r = − 0.224, P = .507) (b) 2–6 mm annulus ring (Spearman correlation r = − 0.309, P = .355) or (c) optical coherence tomography grading (Spearman correlation r = − 0.223, P = .510)