The anterior segment or anterior cavity
is the front third of the
eye that includes the structures in front of the
vitreous humour: the
cornea
The cornea is the transparency (optics), transparent front part of the eyeball which covers the Iris (anatomy), iris, pupil, and Anterior chamber of eyeball, anterior chamber. Along with the anterior chamber and Lens (anatomy), lens, the cornea ...
,
iris,
ciliary body, and
lens
A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (''elements'') ...
.
[Cassin, B. and Solomon, S. ''Dictionary of Eye Terminology''. Gainesville, Florida: Triad Publishing Company, 1990.]["Departments. Anterior segment."](_blank)
Cantabrian Institute of Ophthalmology.
Within the anterior segment are two fluid-filled spaces:
* the
anterior chamber between the posterior surface of the cornea (i.e. the
corneal endothelium) and the iris.
* the
posterior chamber between the iris and the front face of the vitreous.
fills these spaces within the anterior segment and provides nutrients to the surrounding structures.
Some ophthalmologists and optometrists specialize in the treatment and management of anterior segment disorders and diseases.
See also
*
Posterior segment
*
Toxic anterior segment syndrome
References
External links
*
Human eye anatomy
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