IRCT201104266293N1 IRCT 2011-06-24 Tehran University of Medical Sciences Intravitreal Injection of Triamcinolone Acetonide in Retinitis Intravitreal Injection of Triamcinolone Acetonide in Retinitis Pigmentosa with cystoids macular edema 2007-09-23 anticipated 161 Complete https://irct.ir/trial/6742 interventional Randomization: N/A, Blinding: Not blinded, Placebo: Not used, Assignment: Single, Purpose: Treatment. N/A cystoids macular edema (CME) secondary to retinitis pigmentosa (RP). Intravitreal injection of 4mg Triamcinolon in 0.1cc were done only once using a 29 gauge needle at 3.5mm posterior to the limbus. Complete eye examinations including best corrected visual acuity (BCVA) tests, photography with autofluorescence, fluorescein angiography, and OCT is done before the injection and at 1 month, 3 months, and 6 months after injection. Results were then was compared. In cases of bilateral CME, only one eye was selected for injection..