Corpus: Eyeball
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1. Definition
The eyeball is a spherical organ located in the orbit. It is part of the organ of vision (organon visus). In an adult, the average diameter is about 2.5 cm. The eyeball contains, among other things, the optical (iris and lens) and nervous (retina) structures necessary for seeing with the eye.
2. Classification
The eyeball can be divided into the following sections:
- Outer eye skin (tunica fibrosa bulbi, tunica externa bulbi)
- Sclera (sclera)
- Cornea (cornea)
- Middle eye skin or uvea (tunica vasculosa bulbi, tunica media bulbi)
- Iris (iris) with pupil
- Corpus ciliare (ciliary body)
- Choroid (choroid)
- Inner skin of the eye or retina (tunica interna bulbi)
- Pars optica retinae
- Ora serrata (jagged borderline)
- Pars caeca retinae
- Lens (lens of the eye)
- Corpus vitreum (vitreous body)
- Camera anterior bulbi (anterior chamber of the eye) with angulus iridocornealis (chamber angle)
- Camera posterior bulbi (posterior chamber of the eye)
On the outside, the eyeball is surrounded by a fascia-like layer of connective tissue, the Tenon's capsule.