Medicogramover 8 years ago

Iris coloboma: Coloboma is a Greek word meaning; Defect.A coloboma is a hole in one of the structures of the eye, such as the iris, retina,choroid, or optic disc. The hole is present from birth and can be caused when a gap called the choroid fissure, which is present during early stages of prenatal development, fails to close up completely before a child is born.