anomaly. The causes of Peters’ anomaly are unknown; it may be caused by genetic factors, environmental factors, or both. Peters’ anomaly displays various patterns of inheritance, ei- ther autosomal dominant or autosomal recessive, but cases of Fig. 2. Inferior iris coloboma with cataract in the right eye. Fig. 3. Large chorioretinal coloboma affecting the retina and optic nerve head in the right eye. D Cho, et al. Peters' Anomaly autosomal dominant Peters’ anomaly are rare [4]. The PAX6 gene, which is expressed in the developing cen- tral nervous system including the eye, has been shown to be vital to eye development and to be influential at early stages of ocular morphogenesis, acting as a master control gene [5]. It is therefore believed to play an important role in ocular embryogenesis. Mutations in the PAX6 gene are associated with various ocular anomalies, including Peters’ anomaly, anir- idia and chorioretinal coloboma [6]. We did not perform genet- ic analyses of our patient. Genetic studies of the patient and his relatives may help to elucidate the causes of this anomaly. Our patient also had chorioretinal coloboma in the right eye. Retinal detachment is the most common complication associated with chorioretinal colobomas, due to breaks with- in or adjacent to the coloboma. The retina overlying the cho- roidal defect in such cases remains thin and undifferentiated and, therefore, prone to retinal breaks and detachment. Most retinal detachments associated with chorioretinal coloboma require surgery and have poor visual outcomes. Forty percent of affected individuals may develop retinal detachment during their lifetimes [7-10]. Therefore, it is important to examine the fundus in detail, if possible, in patients who are diagnosed with Peters' anomaly to detect any associated congenital anomalies such as chorioretinal coloboma. It is recommended to examine eyes affected by chorioretinal coloboma at least annually to prevent complications such as retinal detachment. To our knowledge, this is the first documented case of unilat- eral Peters’ anomaly with chorioretinal coloboma in the other eye in Korea. Conflict of Interest No potential conflict of interest relevant to this article was reported. References 1. Ozeki H, Shirai S, Nozaki M, et al. Ocular and systemic fea- tures of Peters' anomaly. Graefes Arch Clin Exp Ophthalmol 2000;238:833-9. A B Fig. 4. (A) Vertical axial scan of the right eye shows staphyloma. (B) Vertical axial scan of the left eye shows normal findings. 353