Spontaneous deflation of an iris pigment epithelial cyst documented with AS-OCT

A 3-year-old girl presented with a black pupillary margin iris mass in the right eye diagnosed as an iris pigment epithelial (IPE) cyst, central (pupillary) type. The diagnosis was verified by anterior-segment optical coherence tomography (AS-OCT), which initially showed a circumscribed, round thin-walled cyst with clear lumen attached by a strand to the IPE. On follow-up 3 months later, the IPE cyst had deflated and AS-OCT showed an irregular collapsed surface with no lumen and optical shadowing. The authors report a case in which AS-OCT was used to provide information regarding the diagnosis and behavior of an IPE cyst.