Purpose: To report a rare case of slow progression carotid cavernous fistula (CCF) with central retinal vein occlusion (CRVO).Case summary: A 66-year-old man presented conjunctival injection and proptosis in the right eye. Best-corrected visual acuity was 0.8 0.5 left eye, respectively, vessel enlargement subconjunctival hemorrhage were observed eye on slit lamp examination. Due to suspicion CC...