We present a case of congenital mydriasis in a 6-year-old boy who had a history of patent ductus arteriosus. Anterior segment examination revealed mydriasis in both eyes. Fundus examination revealed retinal arteriolar tortuosity in both eyes. Congenital mydriasis is extremely rare, and the incidence of extreme patent ductus arteriosus is low. We discuss congenital mydriasis as a separate entity and in combination with heart diseases.
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Shinji Makino (2024) studied this question.
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