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¹M.D, Nigde State Hospital, Eye Clinic, Nigde/TURKEY
²M.D, Bingol State Hospital, Eye Clinic, Bingol/TURKEY
³M.D. Associate Professor, Sisli Training and Research Hospital, Eye Clinic, Istanbul/TURKEY Branch retinal artery occlusion (BRAO) is a rare retinal vascular disorder in which one of the branches of central retinal artery is obstructed. It is a less common disorder and seen more often in young adults when compared to central retinal artery occlusion (CRAO). A 33 year-old male and a 39-year old female were admitted to our outpatient department with the complaint of sudden, painless visual loss in one eye. Fundoscopic examination revealed BRAO and a procedure similar to emergency protocol in management of CRAO was performed. Labaratory studies showed protein S deficiency in both cases. The final visual acuities at the 7 months follow up were better when compared to visual acuities seen in SRAT cases. Hereditery trombofilia due to protein S deficiency should be kept in mind as an etiological factor of BRAO especially in young adults. Keywords : Branch retinal arterial occlusion, protein S deficiency