Triamcinolone acetonide is a kind of medium-acting hormone drug, which is generally used in ophthalmology for uveitis. In addition, macular edema can reduce the fragility of retinal blood vessels, reduce the exudation of retinal blood vessels, and facilitate the absorption of retinal exudate, so that macular edema can be reduced. However, the treatment of macular edema is usually combined with laser, and anti-VEGF and other drugs in combination, and the treatment of macular edema with tretinoin alone is only symptomatic treatment. The real treatment of macular edema is to find out the cause of macular edema, combine with laser and anti-VEGF drugs, and possibly surgery if necessary.