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14.3: Overview

  • Page ID
    10191
  • 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