choroidealepitelet

Choroidealepitelet is a term encountered in a limited number of sources to denote an epithelium associated with the choroid of the eye. It is not part of the current standard anatomical nomenclature and is rarely used in modern ophthalmology texts.

Anatomical context: The choroid is the vascular layer between the sclera and the retina, comprising connective tissue stroma, pigmented cells, and the choriocapillaris. The inner surface of the choroid is separated from the outer retina by Bruch’s membrane and the retinal pigment epithelium, rather than by a distinct choroidal epithelium. Therefore, there is no widely recognized “choroidal epithelium” as a separate functional layer in contemporary anatomy. If the term is employed, it may refer to a historical conception or to an epithelial structure within associated tissues in specific species, but its exact definition is not standardized.

Comparative and historical notes: Some older or non-English texts may use a form of the term to describe epithelial components of choroidal origin or to discuss the interface between choroid and retina; modern terminology such as retinal pigment epithelium, Bruch’s membrane, and choroid proper is preferred in current practice.

Function and significance: Since the choroid does not contain a distinct epithelium like the retinal pigment epithelium, no separate epithelial function is defined for a “choroidealepitelet” in standard anatomy. The choroid’s roles include supplying blood to the outer retina, participating in thermoregulation, and contributing to the outer blood-retinal environment through surrounding tissues.