coloboma
col·o·bo·ma (kŏl'ə-bōʹmə) n. pl. col·o·bo·ma·ta (-mə-tə)
An anomaly of the eye, usually a developmental defect, that often results in some loss of vision.
  [New Latin colobōma, from Greek kolobōma, part removed in mutilation, from koloboun, to mutilate, from kolobos, maimed.]   col'o·boʹma·tous adj.

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▪ congenital defect
      failure of one or more structures in the eye to fuse during embryonic life, creating a congenital fissure in that eye. Frequently several structures are fissured: the choroid (the pigmented middle layer of the wall of the eye), the retina (the light-sensitive layer of tissue that lines the back and sides of the eye), the ciliary body (the source of the aqueous humour and the site of the ciliary muscle, by which the curvature of the crystalline lens is flattened for far vision), and the iris (the pigmented ring of tissue visible around the pupil). The fissure may extend to the head of the optic nerve. Colobomata may also be confined to individual structures of the eye. Fissures in the retina cause blind spots (scotomata), and a coloboma in the optic nerve also seriously affects vision.

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Universalium. 2010.

Look at other dictionaries:

  • Coloboma — Classification and external resources ICD 10 Q10.3, Q …   Wikipedia

  • Coloboma — Clasificación y recursos externos CIE 10 Q10.3 CIE 9 743.4 DiseasesDB 29894 …   Wikipedia Español

  • coloboma — m. oftalm. Malformación congénita del ojo que se genera al no cerrarse las hendiduras o fisuras fetales del ojo. Puede afectar al iris o al párpado. Precisa reparación quirúrgica. Medical Dictionary. 2011. coloboma …   Diccionario médico

  • colobomă — colobómă s. f., pl. colobóme Trimis de siveco, 10.08.2004. Sursa: Dicţionar ortografic  COLOBÓMĂ s.f. (med.) Fisură congenitală sau traumatică a formaţiilor din segmentul anterior al ochiului. [< fr. coloboma, cf. gr. koloboma – mutilare] …   Dicționar Român

  • Coloboma — Col o*bo ma, n. [NL. fr. Gr. ?, the part taken away in mutilation, fr. ? to mutilate.] (Anat. & Med.) A defect or malformation; esp., a fissure of the iris supposed to be a persistent embryonic cleft. [Webster 1913 Suppl.] …   The Collaborative International Dictionary of English

  • Colobōma — (gr.), Spalte von Theilen, die ein Ganzes bilden sollen, bes. C. palpebrarum, Augenlidspalte, s. u. Auge H) …   Pierer's Universal-Lexikon

  • Coloboma — vgl. Kolobom …   Das Wörterbuch medizinischer Fachausdrücke

  • 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… …   Medical dictionary

  • coloboma — Eng. Coloboma Alteración congénita en la cual se produce un déficit en el cierre o soldadura de la fisura óptica y que puede afectar al desarrollo de la parte inferior de distintas estructuras oculares …   Diccionario de oftalmología

  • coloboma — n. a defect in the development of the eye causing abnormalities ranging in severity from a notch in the lower part of the iris, making the pupil pear shaped, to defects behind the iris in the fundus. A coloboma of the eyelid is a congenital notch …   The new mediacal dictionary

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