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NUSC2P30 > The Eyes > Flashcards

The Eyes Flashcards

1
Q

Extraocular muscles

Rectus

A

superior
inferior
medial
lateral

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2
Q

Extraocular muscles

Oblique

A

superior

oblique

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3
Q

What muscles do the cranial nerves innervate

A

CN VI abducens nerve = lateral
CN IV trochlear nerve = superior oblique
CN III oculomotor = everything else

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4
Q

What is in the outer layer of the eye

A

Sclera: white protective covering, focuses light on retina
Cornea: sensitive to touch, cornea light reflex

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5
Q

What is in the middle layer of the eye

A 
Choroid 
Ciliary 
Iris 
Pupil 
Lens 
Anterior and posterior chambers
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6
Q

Choroid

A

dark pigmentation, prevents light from reflecting internally

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7
Q

Ciliary

A

controls the thickness of lens

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8
Q

Iris

A

controls amnt of light that hits retina by varying size of opening

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9
Q

Pupil

A

cn III causes constricting of pupil

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10
Q

Lens

A

bulges for near objects

flattens for far

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11
Q

Anterior and posterior chambers

A

brings nutrients to surrounding tissue

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12
Q

What composes the inner layer

A

Retina

Optic Disk

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13
Q

Retina

A

light rays are changed into nerve impulse

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14
Q

How do images appear on the retina

A

Reverse and upside down

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15
Q

What is pupillary light reflex
Direct light reflex
Consensual light reflex

A

When light is shined into one pupil, both eyes constrict at the same time

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16
Q

What is fixation

A

Reflex direction of the eye towards s/t that catches someone’s

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17
Q

Accommodation

A

Adaption of the eye to near objects

Cornea curvatures

18
Q

Presbyopia

A

occurs with age

- cornea hardens and can’t accommodate for close things

18
Q

What is it called when you see blind spots in your visual field

A

Scotoma

19
Q

What is the confrontation test do

A

Tests peripheral vision

Both hold cards

20
Q

What is the hirshbergs test

A

“Corneal reflex test” shine light and see if it’s on the same spot

21
Q

What is the cover uncover test

A

Test parallel alignment and muscle weakness

22
Q

Compare phoria vs tropia

What are the kinds

A

Mild only during test
Tropia permanent

Exo outward drift
Eso inward

23
Q

What does lid lag indicates

A

Hyperthyroidism

24
Q

What is the term for lid drooping

A

Ptsosis

25
Q

What are protruding vs sunken eye balls called

A

Exophthalmos

Enophthalamos

26
Q

What are you inspecting for in the cornea and and lens

A

Smoothness and clarity

27
Q

What are you inspecting for in the iris and pupil

A

Pupillary light reflex

28
Q

What does assymmetry means in the ____ test?

A

Muscle weakness

In the corneal light reflex test

29
Q

Sclera icterus

A

yellowing of the sclera up to the cornea

indicates jaundice

30
Q

Myopia

A

near sight

31
Q

Hyperopia

A

far sightd

32
Q

Floaters

A

debris gets trapped

33
Q

Cataract

A

cloudy and opaque (protein clusters) lens

34
Q

Fovea centralis

A

site where vision is most sharp

35
Q

Cones

A

color vision

36
Q

Rods

A

Light and dark discrimination

37
Q

Glaucom

A

age relaed –> intraocular pressure results in loss of peripheral vision

38
Q

Lacrimal system

A

tear production and drainage to wash the eye

39
Q

20/20

20/40

A

20/40 vision means that the test subject sees at 20 feet what a normal person sees at 40 feet.

40
Q

pinguecullae

A

shown on the sclera, yellow nodules from prolonged exposure to the sun, wind, and dust.

41
Q

pterygium

A

triangular growth of the conjunctiva that grows over the cornea

NUSC2P30 (6 decks)

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