Coloboma - EyeWiki
Coloboma of the iris, ciliary body, choroid, retina and/or optic nerve derive from failed or incomplete closure of the embryonic fissure (also known as choroidal or optic fissure) during development. Eye colobomas are located in the inferior nasal quadrant.
Coloboma - National Eye Institute
2024年12月6日 · Coloboma happens when a baby’s eye doesn’t develop normally during pregnancy because of abnormal or changed genes that affect eye development. Coloboma sometimes runs in families. Environmental factors, such as drinking alcohol during pregnancy, may also increase a baby’s risk for coloboma.
Coloboma: Causes, Treatment, and More - Verywell Health
2024年7月31日 · Coloboma is a congenital (present at birth) abnormality of the eye. Colobomas are missing pieces of tissue that may appear as gaps or notches. When coloboma affects the iris, it manifests as a keyhole or cat-eye appearance of the pupil.
Ocular coloboma—a comprehensive review for the clinician
The coloboma was sub-grouped as—isolated iris coloboma, isolated optic disc coloboma or chorio retinal coloboma (with or without iris or disc coloboma). The associations were also grouped based on inheritance pattern.
Coloboma - Wikipedia
Ocular coloboma is relatively uncommon, affecting less than one in every 10,000 births. The classical description in medical literature is of a keyhole-shaped defect. A coloboma can occur in one eye (unilateral) or both eyes (bilateral). Most cases of coloboma affect only the iris.
Coloboma: MedlinePlus Genetics
Colobomas may be present in one or both eyes and, depending on their size and location, can affect a person's vision. Colobomas affecting the iris, which result in a "keyhole" appearance of the pupil, generally do not lead to vision loss.
Atlas Entry - Iris coloboma - University of Iowa
2012年7月12日 · This photograph is classic for congenital coloboma of the iris. Whenever the cornea presents with this pear-shape and is pointed inferonasally, there is a strong possibility that there will be a keyhole coloboma of the iris in that area.
Coloboma of the iris: MedlinePlus Medical Encyclopedia
2023年11月8日 · Coloboma of the iris is a hole or defect of the iris of the eye. Most colobomas are present since birth (congenital).
Congenital ocular coloboma - NIH Genetic Testing Registry …
Colobomas affecting the iris, which result in a "keyhole" appearance of the pupil, generally do not lead to vision loss. Colobomas involving the retina result in vision loss in specific parts of the visual field.
Congenital ocular coloboma (Concept Id: C0009363) - National …
Coloboma is an ocular birth defect resulting from abnormal development of the eye during embryogenesis. It is defined as a congenital defect in any ocular tissue, typically presenting as absent tissue or a gap, at a site consistent with aberrant closure of the optic fissure.
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