先天性无虹膜（ｃｏｎｇｎｉｔａｌ ａｎｉｒｉｄｉａ）是一种先天性虹膜阙如畸形，发病率约为十万分之一。作者遇一家２代４人患病，报告如下。 先证者男性，６岁。因被父母发现双眼视力差３个月于１９９８年４月２８日入院。患儿系第５胎，有４个姐姐，其中二姐、四姐及其母 Congenital aniridia (congnital aniridia) is a deformity of the congenital iris, the incidence is about one hundred thousandth. The author encountered a 2 generation 4 people sick, the report is as follows. Proof of the male, 6 years old. Because of her parents found that poor eyesight 3 months in April 28, 1998 admission. Children with the first 5 tires, 4 sisters, including the second sister, fourth sister and their mother