Objective To observe the morphologic characters of macular lesions in patients with central retinal vein occlusion(CRVO) in optical coherence tomography(OCT). Methods Thirty-eight patients with the clinical diagnosis of CRVO were examined by OCT.Four scan lines traversing the fovea with the same length and the same angle gap were performed as the basic scan in every eye.Additional scan were selected according to individuals including changing the length or angle of the scan lines and selecting different diameter circle pattern scan. Results Cystoid macular edema (CME) was found in 15 eyes,detachment of the neurosensory retina in 6 eyes，thickened neurosesory retina in 11 eyes,slight intraretinal fluid in 4 eyes,and markedly thichened neurosensory retina in 2 eyes with secondary premacular membrane and intraretinal fluid. Conclusions The major OCT morphologic characters of macular lesions in patinets with CRVO may include:cystoid macular edema,detachment of neurosensory retina,and secondary premacular membrane and pigmentary epithelial changes.These would be helpful for diagnosing and evaluating macular lesion in CRVO. (Chin J Ocul Fundus Dis, 1999, 15: 201-204)