HYALOID FOSSA Meaning and
Definition
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The hyaloid fossa, also known as the fossa hyaloidea, is a term used in anatomy to describe a concave depression located in the inner surface of the vitreous body of the eye. This anatomical feature, named after its Latin origins "hyalos" meaning glass, and "fossa" meaning a hollow or depression, is a shallow groove that houses the base of the hyaloid canal.
The hyaloid fossa is formed during embryonic development and persists into adulthood. It serves as a crucial point of attachment for the hyaloid artery and hyaloid canal. The hyaloid artery, a branch of the central retinal artery, supplies nutrients to the developing lens and retina during embryogenesis before regressing later in development. The hyaloid canal, meanwhile, is a small duct-like structure that runs through the vitreous humor, connecting the optic disc to the lens.
The hyaloid fossa plays a vital role in the support and stability of the vitreous body and the lens. It acts as a structural attachment point that facilitates the proper positioning and movement of the lens during eye movements. Additionally, it assists in the maintenance of the normal pressure within the vitreous cavity, aiding in the modulation of the intraocular pressure.
Understanding the anatomical characteristics of the hyaloid fossa is essential in comprehending ocular development, functioning, and pathologies associated with the vitreous body, such as hyaloid remnants and inherited eye disorders.
Etymology of HYALOID FOSSA
The word "hyaloid fossa" is derived from two components: "hyaloid" and "fossa".
The term "hyaloid" originates from the Greek word "hyalos", meaning "glass", and the Greek suffix "-oides", which means "resembling". In anatomy, "hyaloid" refers to the vitreous humor, a transparent, gel-like substance that fills the eyeball, resembling glass in its clarity.
The word "fossa" has Latin origins, meaning "pit" or "hollow". In anatomy, a "fossa" refers to a depression or concave area in a bone or organ.
Thus, when combined, "hyaloid fossa" refers to the anatomical depression or pit into which the hyaloid artery is located near the optic nerve head in the eye.
