Fig. 3

In vivo confocal microscopy findings of the cornea. a, b Squamous epithelial layer. White arrows indicate the elongated squamous epithelial cells with a tendency to slough off. c, d White arrows indicate the sub-basal nerve plexus, which was either tortuous and beading in the right eye (c), or short and fragmented in the left eye (d). The density of the nerve plexus was also severely affected. e, f White arrows indicate the corneal nerve bundle in the anterior stromal layer. Both eyes showed a significant decrease in the width, density, and length of the anterior corneal stromal nerve bundles compared with normal eyes