Fig. 1

In-vivo confocal microscopy (IVCM) images of corneal nerves in each body mass index (BMI) category. Representative IVCM images of corneal nerves and inferior whorl across different BMI categories: (a) underweight, (b) normal, (c) overweight, (d) class I obesity, (e) class II obesity, and (f) class III obesity. Representative IVCM images illustrating inferior whorl morphology across different stages of BMI categories: (g) underweight, (h) normal, (i) overweight, (j) class I obesity, (k) class II obesity, and (l) class III obesity. As BMI severity increases, there is a progressive decrease in corneal nerve fiber density, length, branch density, total branch density, area, and fractal dimension