Chapter 17 - Sense Organs Flashcards Preview

Medical Terminology > Chapter 17 - Sense Organs > Flashcards

Flashcards in Chapter 17 - Sense Organs Deck (53)
1

Accomodation

Normal adjustment of the eye to focus on objects from far to near

2

Anterior Chamber

Area behind the cornea and in front of the lens and iris; contains aqueous humor

3

Aqueous Humor

Fluid produced by the ciliary body and found in the anterior chamber

4

Biconvex

Consisting of two surfaces that are rounded, elevated, and curved evenly, like part of a sphere

5

Choroid

Middle, vascular layer of the eye, between the retina and the sclera

6

Ciliary Body

Structure surrounding the lens that connects the choroid and iris. Contains ciliary muscles that control shape of lens

7

Cone

Photoreceptor cell in the retina that transforms light energy into a nerve impulse

8

Conjunctiva

Delicate membrane lining the undersurface of the eyelids and covering the anterior eyeball

9

Cornea

Fibrous transparent layer of clear tissue that extends over the anterior portion of the eyeball

10

Fovea Centralis

Tiny pit or depression in the retina that is the region of clearest vision

11

Fundus of the Eye

Posterior, inner part of the eye

12

Iris

Pigmented layer that opens and closes to allow more or less light into the eye

13

Lens

Transparent, biconvex body behind the pupil of the eye; refracts light rays to bring them into focus on the retina

14

Macula

Yellowish region on the retina lateral to and slightly below the optic disc; contains fovea centralis

15

Optic Chiasm

Point at which optic nerve fibers cross in the brain

16

Optic Disc

Region at the back of the eye where the optic nerve meets the retina

17

Optic Nerve

Cranial nerve carrying impulses from the retina to the brain

18

Pupil

Central opening of the eye, surrounded by the iris, through which light rays pass

19

Refraction

Bending of light rays by the cornea, lens, and fluids of the eye to bring the rays into focus on the retina

20

Retina

Light-sensitive nerve cell layer of the eye containing photoreceptor cells

21

Rod

Photoreceptor cell of the retina essential for vision in dim light and for peripheral vision

22

Sclera

Tough, white outre coat of the eyeball

23

Thalamus

Relay center of the brain. Optic nerve fibers pass through the thalamus on their way to the cerebral cortex.

24

Vitreous Humor

Soft, jelly-like material behinds the lens in the vitreous chamber; helps maintain the shape of the eyeball

25

aque/o

water

26

blephar/o
palpebr/o

eyelid

27

conjunctiv/o

conjunctiva

28

cor/o
pupill/o

pupil

29

corne/o
kerat/o

cornea

30

cycl/o

ciliary body or muscle of the eye

31

dacry/o
lacrim/o

tears, tear duct

32

ir/o
irid/o

iris

33

ocul/o
ophthalm/o

eye

34

opt/o
optic/o

eye, vision

35

papill/o

optic disc; nipple-like

36

phac/o
phak/o

lens of the eye

37

retin/o

retina

38

scler/o

sclera

39

uve/o

uvea; vascular layer of the eye

40

vitre/o

glassy

41

ambly/o

dull, dim

42

dipl/o

double

43

glauc/o

gray

44

mi/o

smaller, less

45

mydr/o

widen, enlarge

46

nyct/o

night

47

phot/o

light

48

presby/o

old age

49

scot/o

darkness

50

xer/o

dry

51

-opia

vision

52

-opsia

vision

53

-tropia

to turn