T2DM: type 2 diabetes mellitus; SBP: systolic blood pressure; DBP: diastolic blood pressure; IOP: intraocular pressure; HbA1C: glycated hemoglobin; BCVA: best-corrected visual acuity; VEGF: vascular endothelial growth factor; PPV: pars plana vitrectomy; IP: intraoperative photocoagulation; LPC: laser photocoagulation. This evidence concerns the gene VEGFA and diabetes mellitus.