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Nurs 203 > eye > Flashcards

eye Flashcards

1
Q

the eye is

A

sensory organ of vision

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2
Q

palpebral fissure

A

the elliptical open space between the eyelids

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3
Q

the lower eyelid margin is at the ____-

A

limbus

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4
Q

the corner of the eye is the _____

A

canthus

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5
Q

exposed part of the eye has a transparent protective calling which is the _____

A

conjunctiva

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6
Q

the palpebral conjunctiva ….

A

lines the eyelids and is clear with many small blood vessels

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7
Q

tears drain into the ______

A

puncta

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8
Q

4 straight (or rectus) muscles are . . .

A

superior, inferior, lateral, and medial

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9
Q

2 slanting (or oblique) muscles are the . . .

A

superior and inferior

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10
Q

movement of the extraocular muscles is stimulated by _________

A

3 cranial nerves

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11
Q

cranial nerve VI ________ the eye

A

innervates

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12
Q

cranial nerve IV __________ the eye

A

innervates superior oblique muscle

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13
Q

Cranial nerve III innervates ______

A

all others; superior, inferior, medial rectus and inferior oblique

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14
Q

sensitive to touch, contact with a wisp of cotton stimulates a blink in both eyes

A

cornea

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15
Q

cranial nerve ___ carries the afferent sensation into the brain

A

V

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16
Q

cranial nerve __ carries the efferent message that stimulates the blink

A

VII

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17
Q

has dark pigmentation to prevent light from reflecting internally and is heavily vascularized to deliver blood to the retina

A

choroid

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18
Q

functions as a diaphragm, varying the opening at its centre, controlling the amount of light admitted into the retina

A

iris

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19
Q

size of the ____ is determined by a balance between the parasympathetic and sympathetic chains of the autonomic nervous system

A

pupil

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20
Q

a transparent biconvex disc located just behind the pupil

A

lens

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21
Q

posterior to the cornea and anterior to the iris and lens

A

anterior chamber

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22
Q

lies behind the iris to the sides of the lens

A

posterior chamber

23
Q

the visual receptive layer of the eye in which light waves are changed into the nerve impulses

A

retina

24
Q

area in which fibres from the retina converge to form the optic nerve

A

optic disc

25
Q

normally include a paired artery and vein extending to each quadrant, growing progressively smaller in calibre as they reach periphery

A

retinal vessels

26
Q

located on the temporal side of the fundus,

A

macula

27
Q

_____ transforms the light stimulus into nerve impulses that are conducted through the optic nerve and the optic tract to the visual cortex of the occipital lobe

A

retina

28
Q

all _____ ______ collect to form the optic nerve, but they maintain this same spatial arrangement with nasal fibres running medially and temporal fibres running laterally

A

retinal fibres

29
Q

the right side of the brain looks at the _____ side of the world because _____ fibres cross over at the optic chiasm

A

left, nasal

30
Q

the normal constriction of the pupils when bright light shines on the retina

A

pupillary light reflex

31
Q

pupillary light reflex is a subcortial _________

A

reflex arc

32
Q

stimulation of the blind eye causes no response because the sensory afferent in cranial nerve ____ is ______

A

II is destroyed

33
Q

the adaptation of the eye for near vision

A

accommodation

34
Q

when visual acuity falls it is essential for nurses to assess the risk for

A

falls, social isolation, and the impact on relationships

35
Q

the leading cause of blindness in Canada, the breakdown of cells in the macula of the retina resulting in loss of central vision and area of clearest vision

A

age related macular degeneration

36
Q

lens opacity, results from a clumping of protein in the lens

A

cataract formation

37
Q

increased intraocular pressure

A

glaucoma

38
Q

leading cause of visual impairment in people younger than 65, is highest in diabetic patients with concurrent proteinuria

A

diabetic retinopathy

39
Q

medications that have ocular adverse effects

A

systemic and topical

40
Q

blind spot in the visual field surrounded by an area of normal or decreased vision, occurs with glaucoma and with disorders of optic nerve pathway

A

scotoma

41
Q

the inability to tolerate light

A

photophobia

42
Q

perception of two images of a single object

A

diplopia

43
Q

most commonly used and accurate measurement of visual acuity

A

snellen eye chart

44
Q

in the snellen eye chart exam the larger the denominator the ______ the vision

A

poorer

45
Q

if pt moves card away while reading this could be a sign of

A

presbyopia

46
Q

the confrontation test measures

A

peripheral vision

47
Q

corneal light reflex assess’s the

A

parallel alignment of the eye axes by shining a light toward the pt eyes

48
Q

the cover-uncover test detects

A

small degrees of deviated alignment by interrupting the fusion reflex that normally keeps the two eyes parallel

49
Q

diagnostic positions test assess’s

A

any muscle weakness by leading the eyes through six cardinal positions of gaze

50
Q

a fine oscillating movement best seen around the iris, assessed in addition to parallel movement

A

nystagmus

51
Q

PERRLA

A

Pupils are Equal, Round, Reactive to Light, and Accommodate

52
Q

red reflex with the ophthalmoscope is caused by

A

the reflection of ophthalmoscope light off the inner retina

53
Q

normal range of finding for the optic disc are

A

creamy yellow-orange to pink, round or oval, distinct and sharply demarcated

54
Q

normal range of findings for the retinal vessels include

A

a paired artery and vein pass through each quadrant, arteries are brighter red than veins, arteries and veins show a regular decrease in calibre as they extend to the periphery

Nurs 203 (10 decks)

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