AIM:To study the relation between corneal epithelium Langerhans cells(LCs) and pathological changes of nerve fibers in patients with diabetic peripheral neuropathy in order to further analyze the pathogenesis and find the possible role of immune mechanism in this process.METHODS:We selected 60 patients with diabetic neuropathy and 32 healthy controls to observe the morphology,number and length of corneal nerve fibers,corneal central sensation and the cell density of LCs to analyze the correlation of the two...