chap 8 study notes
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How can the iris constrict and dilate the pupil?
vitreous
The gel-like substance that reinforces the eyeball and prevents it from collapsing inward is the ___________.,
iris
The pigmented portion of the eye that has a rounded opening through which light passes is the
...extrinsic eye muscles
What "structures" are attached to the outer surface of the eye that produce gross eye movements and make it possible for the eyes to follow objects?
fibrous,vascular,retina
What are the three layers (or coats) that form the wall of the eyeball?
lacrimal fluid
What do the lacrimal glands secrete?
the blind spot
What is the ciliary body?
Lens
What is the name of the biconvex structure that focuses light on the retina?
conjunctiva
What is the name of the membrane that lines the eyelids and covers the outer surface of the anterior sclera?
vascular
What is the name of the middle vascular layer or coat of the eyeball that contains pigment.
optic
What is the name of the nerve that transmits impulses from the eye to the brain for vision?
pupil
What is the name of the rounded opening through which light passes?
optic chaiasma
What is the name of the structure where nerve fibers from the medial side of each eye cross over to the opposite side of the brain?
fiborous
What is the name of the transparent central anterior portion of the fibrous layer through which light first enters the eye?
Protects, moistens, and lubricates the eye
What is the purpose of lacrimal gland secretions?
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What is the tough, white connective tissue layer called?
Lens
What structure divides the eye into anterior and posterior portions or segments?
Aqueous Humor
What substance fills the anterior segment?
viterous
What substance fills the posterior segment?
lateral aspect of each eye
Where are the Lacrimal glands located?