14.3: Overview
- Page ID
- 10191
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The eye itself can be divided into 3 concentric tunics plus the internal components. The three tunics from the outside surface of the eye inward are, (1) the fibrous tunic (cornea and sclera), (2) the vascular tunic (iris, ciliary body, and choroid) and (3) the neuroectodermal (nervous) tunic (retina). These tunics inwardly decrease in size as they become more specialized. Internally, the eye contains the lens and the aqueous and vitreous humors.
Below is a breakdown of the eye structure:
3 Concentric Tunics
1. Fibrous Tunic
Cornea
Sclera
2. Vascular Tunic
Iris
Ciliary Body
Choroid
3. Nervous Tunic
Retina
Additional Structures
Lens
Aqueous Humor
Vitreous Humor
Optic Nerve