<prompt> Macular edema is caused by all exceptMicro aneurysmCapillary dilatationNeovascularizationNone  <response>: Causes of macular edema :-Metabolic alteration :- Diabetes, retinitis pigmentosa, inherited cystoid macular edema CME.Ischemia CRVO, Diabetic retinopathy, severe hypertensive retinopathy, HELLP syndrome, vasculitis.Mechanical force :- Vitreous traction on the macula.Inflammation :- Intermediate uveitis, post-operative CME, choroidal inflammatory diseases.Pharmacotoxicity :- Epinephrine in Aphakia, Betaxolol, latanoprost.. 