Posterior segment of eyeball
Segmentum posterius bulbi oculi
- Related terms: Posterior segment
Definition
The posterior segment of eyeball refers to the broad anatomical region located behind the lens, extending from the posterior surface of the lens (anteriorly), all the way to the back of the eyeball. It includes several structures such as vitreous body, retina, choroid, optic disc, and retinal vessels.
Within the posterior segment lies the postremal chamber of the eyeball (a.k.a. the vitreous chamber). This is the large cavity or space situated between the posterior surface of the lens and the retina. It occupies most of the posterior segment and serves as the space that contains the vitreous body.
Thus, the posterior segment is a broader anatomical region containing multiple structures, whereas the postremal chamber is a single cavity within that region.
References
Standring, S. (Ed.). (2015). Eye (Chapter 42). In Gray's anatomy: The anatomical basis of clinical practice (41st ed., pp. ). Churchill Livingstone.
