InSight
T h e la y e rs o f t h e e y e b a ll
Figure 8.8
THE PLANNER!
The layers of the eyeball provide protection, nourishment, and
the “screen" that transduces light images into nerve impulses.
Layers of the
eye
Cornea
admits and
bends light.
Anterior cavity contains aqueous
humor that maintains shape and
supplies oxygen and nutrients to
lens and cornea.
Ciliary
body secretes
aqueous humor and
alters shape of the lens
for near or far vision.
Medial rectus
muscle moves
eye medially.
Optic nerve carries
axons of ganglion
cells to the brain.
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