Eye

is an almost spherical organ that measures about 2.5 cm

3 principal layers form the wall of the eye.

The external layer of the eye wall

The fibrous tunic is composed of:

Most of the fibrous tunic is the tough sclera, a part of the outer layer that is called:

-provides eye shape
-protects internal components
-The attachment site for extrinsic eye muscles
-Dura mater surrounding optic nerve

is a convex, transparent structure that forms the anterior 1/6 of the fibrous tunic

The structural continuity between the cornea and sclera is called:

The structural continuity between the cornea and sclera is called:

*Inner simple squamous epithelium
*Outer stratified squamous epithelium, corneal epithelium
*avascular

nutrients and oxygen from lacrimal gland fluid

obtains needed gases and nutrients from the fluid in the anterior chamber

The convex shape refracts (bends) light rays coming into the eye.