Vision (BIO 181-201) Flashcards

(41 cards)

1
Q

Conjunctiva

A
  • thin, protective mucous membrane
  • stratified columnar epithelium
  • areolar connective tissue and goblet cells (mucous)
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2
Q

palpebral conjunctiva

A

lines eyelids

extends to cover eye except for cornea

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3
Q

bulbar conjunctiva

A

covers back of eye

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4
Q

lacrimal apparatus

A
  • glads and ducts associated with them

- produces fluids and gets rid of excess fluid in a process

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5
Q

superior rectus

A

looks up

oculomotor nerve

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6
Q

inferior rectus

A

looks down

oculomotor nerve

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7
Q

lateral rectus

A

looks laterally

abducens nerve

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8
Q

medial rectus

A

looks medially

oculomotor nerve

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9
Q

superior oblique

A

eye rolls
looks down and laterally
trochlear nerve

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10
Q

inferior oblique

A

eye rolls
looks up and laterally
oculomotor nerve

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11
Q

cornea

A

covers iris

translucent

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12
Q

outer cornea

A

stratified squamos epithelia

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13
Q

middle cornea

A

collage fiber and fibroblasts

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14
Q

inner cornea

A

simple squamos

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15
Q

sclera

A
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
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16
Q

iris

A
pigmented with melanocytes
changes size of pupil
between cornea and lens
regulated amount of light
circular and radial smooth muscles
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17
Q

pupil

A
  • hole

- black because you can see chorroid (has melanocytes)

18
Q

pigmented retina

A

1 cell layer thick

next to chorroid

19
Q

neural retina

A

sensory information
photoreceptors
neural layer

20
Q

lens

21
Q

crystallins

A

lens proteins
layers
translucent
cataracts appear when they precipitate

22
Q

anterior chamber

A

anterior to lens
between cornea and lens
filled with aqueous humor

23
Q

posterior chamber

A

anterior to lens
between iris and lens
filled with aqueous humor

24
Q

aqueous humor

A
  • always produced

- excess exits in canal of Schelmm to venus circulation (every 90 minutes)

25
vitreous chamber
back of eye | contains vitreous body
26
vitreous body
gel-like maintains position of retina formed as embryo never replaced
27
Rods
``` sensitive to light enable to see in low light no color vision light scatters in retina not in macula lueta or fovea centralis ```
28
rod photopigment
bipolar photoreceptor cells
29
rodopsin
opsin and retinal forms in dark reacts to light
30
light and dark adaptation
in light, opsin and retinal break down and come together in the dark to form rodopsin
31
bleaching
going from dark room to light room | opsin and retinal break apart
32
cones
``` color vision see sharply come to point one axon need bright light photoreceptor cells modified bipolar neuron ```
33
Cone photopiments
react to light | retinal and opsin
34
iodopsin
blue opsin
35
chlorocruorin
green opsin
36
eryrhrocruorin
red opsin
37
fovea centralis
greatest density of cones
38
macula lutea
no rods, only cones
39
visual fiels
nasal or temporal vision field
40
nasal (central) half
enter eye, focus on temporal retina
41
temporal (peripheral) half
focus on nasal retina