Med Term CHP 17

The ability to change the shape of the lens to focus on objects near and far is called

accommodation

The opaque white, outer portion of the eye is the

sclera

The dark brown membrane just deep to the sclera containing many blood vessels is the

choroid

controls how much light enters the eye

iris

The ______ are responsible for sensing bright light and color vision.

cones

Images from each eyes are interpreted together in the visual cortex to create a three-dimensional image called

 

binocular vision

The ______ are responsible for light perception in dim light environment and peripheral vision.

rods

The ______ nerve carries impulses from the eye to the brain.

optic

refracts light

cornea

contains no visual receptors

optic disc

The innermost layer of the eye that contains the receptor cells is the

retina

The opening in your eye is called the

pupil

contains a high concentration of cones

fovea centralis

The colored portion of your eye is called the

the iris

The membrane lining the inner surface of the eyelids and the anterior portion of the eyeball is the

conjuctiva

The _______ controls the shape and thickness of the lens

ciliary body

Fibers in the optic nerve come together in the

optic chiasm

The anterior-most part of the eye is the clear, colorless

cornea

The fluid found in the anterior chamber of the eye is called

aqueous humor

The fovea centralis is in the center of the

macula

The visual cortex of the brain is located in the

occipital lobe

The thick, jelly-like material found in the posterior cavity of the eye is called

vitreous humor

Objects in your right visual field are sensed using the

left half of both retinas

The ________ is found inside the eye and is used to refract light to focus on the retina

lens

Bending light is called

refraction

The _______ connects the cochlea to the semicircular canals

vestibule

Which of the following is an inner ear structure?

cochlea

Which of the following is an outer ear structure?

external auditory meatus

Which of the following is NOT an ossicle?

fovea

The _______ contains balance receptors

semicircular canals

_______ contains hearing receptors

the cochlea

The _________ is the opening to the inner ear

oval window

Earwax is called

cerumen

Which of the following is a middle ear structure?

malleus

The ________ vibrates when soundwaves hit it.

tympanic membrane

The part of your ear that projects from your head is the

auricle

The Eustachian tube is used

equalize pressure

Eustachian tube connects

middle ear to the pharynx

The __________ nerve carries sound impulses to the brain.

auditory

Inside the cochlea is the

organ of corti

combining form for: \n optic disc

papill/o

What does mydr/o mean?

widen

combining form for: \n sclera

scler/o

combining form for: \n dull or dim

ambly/o

suffix -opia & -opsia mean?

vision

What does optic/o mean?

vision.

combining form for: \n glassy

vitre/o

What does ophthalm/o & ocul/o mean?

eye

combining form for: \n light

phot/o

combining form for: \n dry

xer/o

suffix that means: \n to turn

\-tropia

combining form for: \n ciliary body or ciliary muscle of the eye

cycl/o

combining form for: \n iris

ir/o

What does mi/o mean?

less

combining form for: \n retina

retin/o

What does irid/o mean?

iris

What does aque/o mean?

water

What does nyct/o mean?

night

combining form for: \n old age

presby/o

What does cor/o mean?

pupil

combining form for: \n cornea

corne/o

What does lacrim/o mean?

tear

combining form for: \n conjunctiva

conjuctiv/o

What does glauc/o mean?

grey

combining form for: \n darkness

scot/o

combining form for: \n uvea

uve/o

What does opt/o mean?

eye, vision

What does opt/o mean?

phac/o

combining form for: \n tears or tear duct

dacry/o

What does palpebr/o mean?

eyelid

What does kerat/o mean?

cornea

combining form for: \n pupil

pupill/o

What does blephar/o mean?

eyelids

What does dipl/o mean?

double

combining form that means: \n eustachian tube

salping/o

combining form that means: \n vestibule

vestibul/o

mastoid/o

mastoid/o

What does ot/o mean?

ear

combining form that means: \n stapes

steped/o

What does audit/o mean?

hearing

suffix that means: \n instrument to measure

\-meter

What does myring/o mean?

ear drum

What does acous/o mean?

hearing

combining form that means: \n ossicle

ossicul/o

What does auricul/o mean?

ear

What does audi/o mean?

hearing

What does aur/o mean?

ear

combining form that means: \n cochlea

cochle/o

combining form that means: \n tympanic membrane

tympan/o

suffix that means: \n ear condition

\-otia

suffix that means hearing?

\-cusis

In nearsightedness, the eyeball is too long.  This is called

myopia

Abnormal outward eye movement

exotropia

Abnormal downward eye movement

hypotropia

Blockage, inflammation and infection of a nasolacrimal duct and lacrimal sac

dacryocystitis

In farsightedness, the eyeball is too short.  This is called

hyperopia

Inflammation of the eyelid causing redness, crusting, and swilling along the lid margins is

blepharitis

A granuloma formed around an inflamed sebaceous gland

chalazion

Repetitive rhythmic movements of one or both eyes

nystagmus

Outward sagging and eversion of the eyelid

ectropion