Macular edema subsides and vision is still blurred, which may be caused by infection, or it may be caused by ocular diseases, such as neovascularization of the fundus, retinal vascular obstruction or diabetic retinopathy. 1. Infection: When intraocular injection of glucocorticoids such as dexamethasone and other internal eye surgical operations, macular edema symptoms can be reduced, but may be complicated by intraocular infections, so that the refractive medium is cloudy or photoreceptor cells are damaged, resulting in blurred vision. 2. Ocular diseases: macular edema and other primary diseases such as retinal artery occlusion, diabetic retinopathy, etc., most often complicate neovascularization, high permeability of the vessel wall, easy to rupture and hemorrhage resulting in intraocular blood accumulation, causing blurred vision. When blurred vision occurs, it is recommended to do fundus photography or OCT, etc., to clarify the cause of the disease and then timely treatment to avoid aggravation of the disease.