VERMA et al. [25] found in their study that the VEGF level of patients with diabetic retinopathy after cataract phacoemulsification of 58.24 ± 7.11 pg/mL was obviously lower than 116.83 ± 6.25 pg/mL of the routine treatment group, indicating that cataract surgery can obviously reduce the VEGF level of patients with diabetic retinopathy, thereby inhibiting the proliferation of endothelial cells and angiogenesis and improving the therapeutic effect. The gene discussed is VEGFA; the disease is diabetic retinopathy.