Vision (BIO 181-201) Flashcards
(41 cards)
Conjunctiva
- thin, protective mucous membrane
- stratified columnar epithelium
- areolar connective tissue and goblet cells (mucous)
palpebral conjunctiva
lines eyelids
extends to cover eye except for cornea
bulbar conjunctiva
covers back of eye
lacrimal apparatus
- glads and ducts associated with them
- produces fluids and gets rid of excess fluid in a process
superior rectus
looks up
oculomotor nerve
inferior rectus
looks down
oculomotor nerve
lateral rectus
looks laterally
abducens nerve
medial rectus
looks medially
oculomotor nerve
superior oblique
eye rolls
looks down and laterally
trochlear nerve
inferior oblique
eye rolls
looks up and laterally
oculomotor nerve
cornea
covers iris
translucent
outer cornea
stratified squamos epithelia
middle cornea
collage fiber and fibroblasts
inner cornea
simple squamos
sclera
covers eye (not cornea) outermost layer white of eye dense connective tissue fibroblasts collagen fibers a bit rigid and firm gives eyeball shape protects inside structures attachment for 6 extrinsic eye muscles
iris
pigmented with melanocytes changes size of pupil between cornea and lens regulated amount of light circular and radial smooth muscles
pupil
- hole
- black because you can see chorroid (has melanocytes)
pigmented retina
1 cell layer thick
next to chorroid
neural retina
sensory information
photoreceptors
neural layer
lens
proteins
crystallins
lens proteins
layers
translucent
cataracts appear when they precipitate
anterior chamber
anterior to lens
between cornea and lens
filled with aqueous humor
posterior chamber
anterior to lens
between iris and lens
filled with aqueous humor
aqueous humor
- always produced
- excess exits in canal of Schelmm to venus circulation (every 90 minutes)