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Definition of «Coloboma»


Coloboma: A congenital malformation (birth defect) in which part of the eye does not form due to failure of fusion of an embryonic feature called the intraocular fissure. The resultant coloboma can be likened to a missing slice from a pie that may involve a number of different structures within the eye including the choroid, iris, lens, optic nerve, and retina.

A coloboma can occur as an isolated defect in an otherwise normal baby, or it can be part of a multiple congenital malformation syndrome such as the cat-eye syndrome (named after the coloboma which gives the eye something of a feline look). Colobomas are also seen in the aniridia-Wilms tumor association (the concurrence of undergrowth of the iris of the eye and Wilms tumor of the kidney); and the trisomy 13 syndrome (a disastrous disease due to an extra chromosome number 13).

For More Information «Coloboma»

  • Coloboma - RNIB

    A coloboma is a gap in part of the structures of the eye, caused when a baby's eyes do not develop properly during pregnancy.

  • coloboma: Definition from Answers.com

    Library > Literature & Language > Dictionary ( kŏl ' ə-bō ' mə ) n. , pl. , -ma·ta ( -mə-tə ). An anomaly of the eye, usually a developmental defect, that ...

  • Coloboma of the iris: MedlinePlus Medical Encyclopedia

    Coloboma of the iris is a hole or defect of the iris of the eye. Most colobomas are present since birth (congenital). Considerations Coloboma of the iris ...

  • Coloboma: A Rare Birth Defect - GoogoBits

    Finding out your child has a birth defect isn’t easy. Knowing how to live with it makes life bearable. Discover the facts about Coloboma, a rare birth defect affecting ...

  • Eyelid Coloboma

    An eyelid coloboma is a full-thickness defect of the eyelid. ... Instant Lookup Access over 10,000 topics by title ...or, search within full reference content

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