No significant correlation was found between VEGF level and other clinical parameters, including age, sex, blood pressure, DM duration, BCVA, CMT, glucose level, BUN, Cr, and HbA1c (p = 0.361, 0.146, 0.714, 0.160, 0.296, 0.441, 0.739, 0.764, 0.247, and 0.769, respectively; Table 5). The gene discussed is VEGFA; the disease is diabetes mellitus.