,,,, | ICD9 =,,,, | ICDO = | Image = Coloboma.gif| Caption = | OMIM = | MedlinePlus = | eMedicineSubj = | eMedicineTopic = | DiseasesDB = 29894| MeshID = D003103 | }} A coloboma (also part of the rare Cat eye syndrome)'s a hole in one of the structures of the eye, such as the lens, eyelid, iris, retina, choroid or optic disc. The hole's present from birth and can be caused when a gap called the choroid fissure between two structures in the eye, which's present early in development in the uterus,… (More on Coloboma)