Anterior segment
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| Anterior segment | |
|---|---|
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| Human Eye Anterior Segment - Magnified view seen on examination with a slit lamp under diffuse illumination showing conjunctiva overlying the white sclera, transparent cornea, pharmacologically dilated pupil and cataract | |
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| Schematic diagram of the human eye. | |
| Latin | segmentum anterius bulbi oculi |
| Dorlands/Elsevier | s_07/13264628 |
The anterior segment is the front third of the eye that includes the structures in front of the vitreous humour: the cornea, iris, ciliary body, and lens.[1] [2]
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.[1]
Aqueous humor fills these spaces within the anterior segment and provides nutrients to the surrounding structures.
Some ophthalmologists specialize in the treatment and management of anterior segment disorders and diseases.[2]
References
- ↑ 1.0 1.1 Cassin, B. and Solomon, S. Dictionary of Eye Terminology. Gainsville, Florida: Triad Publishing Company, 1990.
- ↑ 2.0 2.1 "Departments. Anterior segment." Cantabrian Institute of Ophthalmology.
See also
Sensory system - Visual system - Eye | |
|---|---|
| Fibrous tunic (outer) | Conjunctiva • Sclera • Schlemm's canal • Trabecular meshwork • Limbus Cornea (Epithelium, Bowman's, Stroma, Descemet's, Endothelium) |
| Uvea (middle) | Choroid (Ciliary processes, Choriocapillaris, Bruch's membrane) • Iris (Stroma) • Pupil • Ciliary body |
| Retina (inner) | Macula • Fovea • Optic disc |
| Anterior segment | Anterior chamber • Aqueous humour • Posterior chamber • Lens |
| Posterior segment | Vitreous humour • Zonule of Zinn |
| Intraocular muscles | parasympathetic (Ciliary muscle, Iris sphincter muscle) • sympathetic (Iris dilator muscle) |
