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HEENT CABS > 1000ft view of eye > Flashcards

1000ft view of eye Flashcards

1
Q

What is the function of the cornea

A

Assist with focusing light
protection

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2
Q

What do the outer layer of the cornea contain

A

nociceptors

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3
Q

What is the sclera of the eye

A

thin anterior covering of the eye

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4
Q

What is the function of the sclera

A

Point of attachment for the eye muscles

attaches cornea to limbus

assists with protection/shape

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5
Q

What is the inner most aspect of the sclera and what is its function

A

lamina fusca
prevents light waves from scattering by absorbing it

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6
Q

What are the cranial nerves of the eye

A

2,3,4,6

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7
Q

What is the iris

A

vascular layer of the eye

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8
Q

What is the function of the iris

A

creates pupil
creates eye color
separates ant &post chambers

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9
Q

What innervates the iris

A

3

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10
Q

What is dilated pupil known as

A

mydriasis

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11
Q

What is constricted pupils known as

A

miosis

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12
Q

What helps constrict the pupil

A

sphincter pupillae

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13
Q

What causes pupil to dilate

A

dilator pupillae

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14
Q

What makes up the fibrous layer of the eye

A

sclera
cornea

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15
Q

What makes up the vascular layer of the eye

A

iris
ciliary body
choroid

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16
Q

What is the function of the choroid

A

helps deliver nutrients to the photoreceptor neurons

assists with absorption of light by preventing reflection/scattering

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17
Q

What is the choroid of the eye

A

vascular layer that wraps from the ciliary body around the posterior aspect of the eye

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18
Q

What is the ciliary body

A

attaches to the lens to help with accommodation
-relaxation
-contraction

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19
Q

What is the function of the ciliary body

A

secretes aqueous humor to fill anterior chamber

20
Q

What autonomic system is in control of ciliary body relaxation

A

sympathetic
*allows for far vision accommodation

21
Q

What autonomic system is in control of ciliary body contraction

A

parasympathetic
*allows for near vision accommodation

22
Q

What is the function of the lens of the eye

A

transparent structure that refracts light

can be pulled to alter the shape and focus light from accommodation

23
Q

What is the lens of the eye

A

transparent structure made up of the capsule, epithelium, and fibers

24
Q

What are the types of fluid in the eye

A

aqueous humor
Vitreous humor

25
Q

What is aqeous humor

A

water like fluid created in the ciliary body through plasma filtration

26
Q

what is the purpose of aqueous humor

A

maintains intraocular pressure

bring nutrients to the avascular aspect of the anterior eye

27
Q

What is vitreous humor

A

thick, jelly like fluid in the posterior aspect of the eye

28
Q

What is the purpose of the vitreous humor

A

keeps intraocular pressure
maintains shape
transmits light to retina

29
Q

What is the vascular supply for the eye

A

posterior ciliary arteries
internal carotid
central retinal artery
ophthalmic artery

30
Q

What is the importance of the canal of Schlemm

A

Drainage of aqueous humor

31
Q

What are the contents within the orbit

A

ophthalmic nerve
optic nerve
ophthalmic vein/artery
lacrimal gland
eyeball
fat
extra ocular muscles

32
Q

What is the purpose of the mucin layer of tears

A

to help the tears stick to the eye

33
Q

What is the lacrimal gland and where is it located

A

located laterally
secretes fluid that moves across the cornea

34
Q

What is the lacrimal punctum and what is its function

A

small holes in the corner of the eye that drain into the lacrimal gland

35
Q

What is the purpose of the lacrimal canal

A

joins the lacrimal duct and lacrimal sac then fluid drains into the nasal cavity through the nasal lacrimal duct

36
Q

What is the meibomian gland

A

oil gland along the edge of the eyelid that secretes oil to prevent tears from evaporating too quickly

37
Q

What is the Zeis gland

A

sebaceous gland

38
Q

What is the moll gland

A

apocrine gland

39
Q

What is the area within the eye with the highest visual acuity

A

macula lutea

40
Q

Which part of the eye contains only cones

A

fovea centralis

41
Q

What is the function of cones within the eye

A

color and visual acuity under well lit conditions

42
Q

What do the cones in the eye contain

A

Phototopsin which helps pick up different colors of visible light spectrum

43
Q

What is the function of rods

A

black/white/gray vision in poorly lit environments

AKA night vision

44
Q

What do the rods in the eye contain

A

rhodopsin

45
Q

What are bipolar cells in the eye

A

in between of photoreceptors and ganglion cells

46
Q

What are ganglion cells in the eye

A

long axon form together to crease CN2

HEENT CABS (6 decks)

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