无虹膜症是一种少见的先天性虹膜缺失,由Arrafa首次报道。国内普查群体发病率为1∶133931,通常为常染色体显性遗传,外显率较高,该病患者通常表现为先天性无虹膜或虹膜组织高度发育不良,主要症状除明显畏光外,常有显著视力减退、弱视和眼球震颤,约2/3患者有家族史,余1/3患者为散 Irritation is a rare congenital iris defect, first reported by Arrafa. The incidence of domestic census groups 1:133931, usually autosomal dominant inheritance, higher penetrance, the disease usually presents as a congenital absence of iris or iris height dysplasia, the main symptoms in addition to significant photophobia, often Have significant vision loss, amblyopia and nystagmus, about 2/3 of patients have a family history, more than 1/3 patients scattered