“…2,7,[26][27][28][29] Moreover, a concentration of MMC substantially greater than that used in refractive surgery, applied in a cyclic manner for the treatment of ocular surface squamous tumors, does not significantly affect the corneal endothelium. 30 In the current study, the loss of endothelial cells 5 years after surgery was not statistically significant and is consistent with the physiologic decrease in corneal endothelial cells. 31 The subbasal nerve plexus is ablated during PRK, and the recovery of nerve fibers is a slow process.…”