Flashcards in Unit VIII - Eye Deck (108)
What divides the eye into general anterior and posterior segments?
What divides the anterior segment of the eye into anterior and posterior chambers?
What else can the ciliary body produce besides the aqueous fluid seen in the anterior segment of the eye?
Glycosaminoglycans of the vitreous body
What contains the ciliary muscle?
What is the action of the ciliary muscle?
Contraction makes lens more convex to allow for nearer vision
What is the colored part of the eye?
What is the range of colors seen of the iris?
Light blue to dark brown
What two muscles make up the iris?
Sphincter pupillae and dilator pupillae
Which muscle of the iris contains fibers that are circumferentially oriented to constrict the pupil?
What part of the autonomic nervous system innervates the sphincter pupillae muscle?
Which muscle of the iris has radially arranged fibers that cause the pupil to enlarge when contracted?
The eye is derived from what embryological layer?
What is another name for the retina?
What does the retina contact externally?
What does the retina contact internally?
How many layers of the retina are there?
What is another term for the pigmented layer of the retina?
What layer of the retina is involved in a detached retina?
Cementing layer (pigmented layer)
What kinds of cells are found in the inner nuclear layer?
What kinds of cells are found in the nerve fiber layer?
Ganglion cell axons
What are the five cells involved in the vision pathway?
Photoreceptors --> inner nuclear layer (bipolar) cells --> ganglionic layer cells --> lateral geniculate body --> Brodmann area 17
What area of the eye is involved with the blind spot?
What is the point at which the optic nerve attaches to the eyeball?
To which side does the optic disc deviate?
What color does the optic disc appear?
White or yellowish
Are photoreceptors present in the optic disc?
No; no vision occurs here
Where do major blood vessels enter the eyeball?
What is located at the very center of the eye?
The macula lutea is the darker area in the center of what structure?