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Med Term > Ch 14 Special Sense Organs and the PNS (Eyes) > Flashcards

Ch 14 Special Sense Organs and the PNS (Eyes) Flashcards

1
Q

consists of nerves that branch out from the brain and spinal cord

A

PNS

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2
Q

sensory nerve endings that respond to various kinds of stimulation

A

receptors

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3
Q

special sense organs

A

eyes, ears, skin, mouth, and nose

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4
Q

small dark circular structure in the center of the eye

A

pupil

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5
Q

colored portion of the eye; contracts or relaxes to control the amount of light entering the eye through the pupil

A

iris

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6
Q

tough outer layer of the eye

A

sclera

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7
Q

accessory organs of the eye (6)

A

muscle, fascia, eyebrow, eyelid, conjunctiva, lacrimal glands

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8
Q

mucous membrane lining the inner surface of the eyelid

A

conjunctiva

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9
Q

produce and store tears

A

lacrimal glands

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10
Q

refraction of light

A

cornea

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11
Q

blood supply

A

choroid

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12
Q

word to describe the refractory adjustment for close vision

A

accommodation

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13
Q

blind spot of the eye

A

optic disc

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14
Q

responsible for peripheral vision, night vision, and detection of motion

A

rods

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15
Q

responsible for color and central vision

A

cones

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16
Q

daltonism

A

color blindness / weakness in which the green or red receptor cones are defected; inherited, sex-linked disorder

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17
Q

achromatic vision

A

total color blindness; inability to see any color

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18
Q

choroid/o

A

choroid

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19
Q

chrom/o

A

color

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20
Q

conjunctiv/o

A

conjunctiva

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21
Q

corne/o, kerat/o

A

cornea

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22
Q

dacry/o, lacrim/o

A

tear

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23
Q

ir/o, irid/o

A

iris

24
Q

ocul/o, ophthalm/o

A

eye

25
Q

opt/o, optic/o

A

vision

26
Q

presby/o

A

old or old age

27
Q

pupill/o

A

pupil

28
Q

retin/o

A

retina

29
Q

ton/o

A

tone or tension

30
Q

secretion of vitreous fluid, helps change the shape of lens

A

ciliary body

31
Q

movement of the eyeball

A

external ocular muscles

32
Q

protection for the eye

A

eyelid

33
Q

light refraction

A

lens

34
Q

transmission of visual info to the brain

A

optic nerve

35
Q

transforms optic signals into nerve impulses

A

retina

36
Q

nearsightedness; parallel rays entering the eye are focused in front of the retina

A

myopia

37
Q

farsightedness, inability of the eyes to focus on nearby objects rays of light entering the eye are brought to focus behind the retina

A

hyperopia

38
Q

uneven focusing of the image, resulting from distortion of the curvature of the lens or cornea

A

astigmatism

39
Q

measurement of the intraocular pressure using a tonometer

A

tonometry

40
Q

hyperopia and impairment of vision d/t advancing years or old age

A

presbyopia

41
Q

agent that dilates the pupil

A

mydriatic

42
Q

ability of the eye to adjust to variations in distance

A

accommodation reflex

43
Q

uses fluorescein to examine movement of blood through blood vessels in the eye

A

fluorescein angiography

44
Q

reduced vision in one eye, not correctable by glasses but by wearing eye patch

A

amblyopia; aka strabismus

45
Q

inflammation of the eyelid

A

blepharitis

46
Q

abnormal progressive condition of the lens, characterized by loss of transparency

A

cataract

47
Q

inflammation of the conjunctiva

A

conjunctivitis; aka red eyes/pink eye

48
Q

abnormal condition of inc. pressure within the eye. Prolonged pressure can damage the retina and the optic nerve

A

glaucoma

49
Q

sty, resulting from an infected sebaceous gland of an eyelash

A

hordeolum

50
Q

progressive deterioration of the retina associated with new vessel formation that can progress to blindness

A

macular degeneration

51
Q

poor vision at night or in dim light

A

nyctalopia

52
Q

excessive sensitivity of the eyes to light

A

photophobia

53
Q

drooping of the upper eyelids

A

ptosis

54
Q

separation of the retina from the choroid, usually resulting from a hole or tear in the retina. If detachment is not halted, total blindness of the eye ultimately results

A

retinal detachment

55
Q

any disease of the retina

A

retinopathy

56
Q

profound inability to see color

A

achromatopsia

Med Term (18 decks)

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