AIM: To evaluate the correlation between retinal thickness and photopic flash electroretinogram(ERG)parameters(Cone a-wave, Cone b-wave, and 30Hz flicker)in patients with central retinal vein occlusion(CRVO)and macular edema.

METHODS: A total of 25 patients(25 CRVO eyes and 25 unaffected fellow eyes)with CRVO underwent the examination of optical coherence tomography(OCT)and photopic falsh ERG. The amplitude and implicit time of the ERG parameters were extracted from the ERG traces. Retinal thicknesses were measured by OCT in nine macular subfields. Then the correlations between ERG parameters and macular morphological parameters were analyzed.

RESULTS: The Cone b-wave and 30Hz flicker implicit time were correlated with macular retinal thickness in seven out of nine subfields, excluding the temporal subfields.

CONCLUSION: The retinal thickness of the macular edema may be associated with inner retinal function in CRVO patients.