Fig. 1

Subfoveal choroidal thickness (SFCT) in patients with macular edema secondary to CRVO. a The representative EDI-OCT image of unaffected contralateral eye; b The representative EDI-OCT image of affected CRVO eye before IVR injection; c The representative EDI-OCT image of affected CRVO eye after IVR injection; White arrowheads point the choroid-scleral junction. SFCT was determined as the vertical distance from the hyperreflective line of the retinal pigment epithelium to the line of the choroid-scleral junction centered on the fovea, it was measured by 2 observers independently, and was recorded with the mean value. d Comparison of SFCT between the unaffected fellow eyes and CRVO eyes. e Comparison of SFCT in CRVO eyes between pre-IVR injection and post-IVR injection. The values were displayed as mean ± standard deviation (SD). The paired t test was used to evaluate the differences. *p < 0.05 was considered statistically significant