To highlight serious adverse effects regarding intravitreal anti-vascular endothelial growth factor (anti-VEGF) therapy, which is widely used for the treatment of retinal diseases, including two cases of post-injection endophthalmitis, one of which was complicated by rhegmatogenous retinal detachment, and one case of secondary cataract following a potentially unnecessary injection. The gene discussed is VEGFA; the disease is Abnormal retinal morphology.