Purpose: To present a case of retinal vascular disease characterized primarily by capillary nonperfusion in an adult with Coats plus syndrome (CPS). Methods: A case and its findings were analyzed. Results: A 38-year-old woman with a history of poliosis, thrombocytopenia, seizures, and white-matter brain lesions was referred for evaluation of bilateral blurred central vision. Fluorescein angiography showed extensive bilateral retinal capillary nonperfusion with retinal arteriolitis in the right eye. Genetic testing found 2 pathological mutations in the conserved telomere maintenance component 1 (CTC1) gene, diagnostic of CPS. Conclusions: Genetic testing may be diagnostic in patients who present with retinal vascular disease and systemic disease suggestive of CPS.
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