Lastly, tumor necrosis factor-related apoptosis-inducing ligand receptor 1 (TRAIL R1) had an average expression level of 899.2±992.8 in the normal group, 148.6±301.3 in the KCGP group, and 3,671.7±4,576.3 in the KC group (p=0.09). Here, TNFRSF10A is linked to keratoconus.