Chapter 17: Eyes Need to Know Flashcards Preview

Medical Terminology > Chapter 17: Eyes Need to Know > Flashcards

Flashcards in Chapter 17: Eyes Need to Know Deck (30):
1

macular degeneration

progressive damage to the macula of the retina

2

strabismus

abnormal deviation of the eye

3

fluorescein angiography

intraveinous injection of flourescein (a dye) followed by serial photographs of the retina through dilated pupils

4

ophthalmoscopy

visual examination of the interior of the eye

5

Snellen chart

assesses visual acuity

6

accommodation

normal adjustment of the eye to focus on objects from far to near. the ciliary body adjusts the lens and the pupil constricts

7

anterior chamber

area behind the cornea and in front of the lens and iris. it contains aqueous humor

8

ciliary body

structure surrounding the lens that connects the choroid and iris. contains ciliary muscles, which control the shape of the lens and it secretes aqueous humor

9

cone

photoreceptor cell in the retina that transforms light energy into a nerve impulse. cones are responsible for colour and central vision

10

conjunctiva

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

11

cornea

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

12

fovea centralis

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

13

iris

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

14

lens

transparent, biconvex body behind the pupil of the eye. it bends light rays to bring them into focus on the retina

15

macula

yellowish region on the retina lateral to and slightly below the optic disc; contains the fovea centralis, which is the area of the clearest vision

16

optic disc

region at the back of the eye where the optic nerve meets the retina. it is the blind spot of the eye because it contains only nerve fibres, no rods or cones, and is thus insensitive to light

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. it appears dark

19

vitreous humor

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

20

blephar/o

eyelid

21

corne/o

cornea

22

kerat/o

cornea

23

phac/o
phak/o

lens of the eye

24

astigmatism

defective curvature of the cornea or lens of the eye

25

presbyopia

impairment of vision as a result of old age

26

cataract

clouding of the lens, causing decreased vision

27

glaucoma

increased intraocular pressure results in damage to the retina and optic nerve with loss of vision

28

macular degeneration

progressive damage to the macula of the retina

29

slit lamp microscopy

examination of anterior ocular structures under microscopic magnification

30

keratoplasty

surgical repair of the cornea

Decks in Medical Terminology Class (65):