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