Fig. 2: Representative images of the sub-basal nerve plexus at the central cornea and inferior whorl region with healthy controls, patients with type 1 diabetes without peripheral neuropathy (T1DPN–) and with peripheral neuropathy (T1DPN+).
From: In-vivo corneal confocal microscopy: Imaging analysis, biological insights and future directions

Note that the nerve density is the least in the T1DPN+ images, followed by the T1DPN– and then healthy controls. The figure was reprinted from Tummanapalli et al. with permission from Elsevier72.