In summary, intravitreal injection of conbercept and triamcinolone acetonide has a good therapeutic effect on diabetic macular edema in pseudophakic eyes after cataract surgery, relieving the intravitreal inflammatory response, reducing the degree of macular edema and improving the visual function of patients by reducing the contents of VEGF, CDF-1, and IL-6. This evidence concerns the gene VEGFA and macular retinal edema.