Case Report: Branch retinal vein occlusion following COVID-19 vaccination and SARS-CoV-2 infection while taking oral contraceptives

Oral contraceptive use, vaccination for Coronavirus disease 2019 (COVID-19), and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection are risk factors for venous thromboembolism. Branch retinal vein occlusion (BRVO) generally develops mid-60s patients. Herein, we present a case of BRVO caused by the above mentioned risk factors in a young woman. To the best of our knowledge, this is the first report about BRVO associated with oral contraceptives, COVID-19 vaccination, and SARS-CoV-2. A 21-year-old woman presented with loss of visual acuity in her right eye for 10 days. She had been receiving oral contraceptives for 2 years for oligomenorrhea before noticing ophthalmological symptoms. Despite having received two doses of an mRNA COVID-19 vaccine, she contracted COVID-19 and developed fever, sore throat, cough, low back pain, and general malaise about 40 days before the initial visit. However, only cough persisted for more than a month. The right eye showed BRVO with macular edema (ME). She did not smoke nor had diabetes or hypertension. Blood test results, including cardiolipin antibody IgG, were normal. She was treated with an intravitreal aflibercept injection. ME in the fundus showed rapid improvement and resolution. Although more than 20 months have passed since the first injection, there has been no relapse of ME. The combination of oral contraceptive use, COVID-19 vaccination, and subsequent SARS-CoV-2 infection could induce the development of venous thromboembolism, thereby leading to BRVO. Given that cases of COVID-19 have increased globally, patients with retinal vein occlusion who use oral contraceptives are likely to be encountered more frequently.