choroid fissure
an indentation at the ventral margin of the eye marking the invaginated borders of the optic cup in larval fish. Usually associated with narrow eyes and often pigmented

Dictionary of ichthyology. 2009.

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  • Choroid fissure — The choroid is the middle, vascular coat of the eye which resides between the sclera and the retina. Early in development the choroid fissure is the slit observed between the two edges of the eye cup. During development it is through the choroid… …   Wikipedia

  • choroid fissure — 1. fissura choroidea ventriculi lateralis. 2. retinal f …   Medical dictionary

  • choroid fissure of lateral ventricle — fissura choroidea ventriculi lateralis …   Medical dictionary

  • Fissure — A cleft or groove. A fissure can be normal or abnormal. A fissure in the cerebral cortex is a normal feature. It is a deep fold that involves the entire thickness of the brain wall. A fissure in the anus is distinctly abnormal. It is a painful… …   Medical dictionary

  • coloboma of choroid — fissure in the choroid, causing a scotoma on the retina, and often associated with defects of the ciliary body and iris …   Medical dictionary

  • retinal fissure — a ventral groove formed by invagination of the optic cup and its stalk by vascular mesenchyme from which the hyaloid vessels develop; called also choroid or optic f …   Medical dictionary

  • transverse fissure — noun 1. : the cleft below the hemispheres of the brain through which the pia mater extends to form the choroid plexuses 2. : a cleft of the liver 3. : a fracture that starts at a crystalline center inside a railhead and spreads outward …   Useful english dictionary

  • Vein — A blood vessel that carries blood low in oxygen content from the body back to the heart. The deoxygenated form of hemoglobin (deoxyhemoglobin) in venous blood makes it appear dark. Veins are part of the afferent wing of the circulatory system… …   Medical dictionary

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

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