Chapter-6 The Sensory System-- Ophthalmology and Otolaryngology Flashcards
Are there many protective structures around the eye?
Yes, there are many protective structures around the eye that help keep it safe and wet.
What structure does the eye rest on?
The socket, which is made up of seven connecting bones in the skull.
What is another name for the socket?
Orbit
What function(s) do the eyelids perform?
1) The eyelids (blepharo) protects the eyes from dust and other floating particles in the air.
2) The eyelids aid in keeping the eye moist.
Is it important to keep the eye moist/wet?
Yes, for this reason, there are additional structures that help keep the eye moist.
What is the lacrimal gland?
The lacrimal gland is a small gland that sits just above and to the side of the eye. It produces tears that stream across the eye and keep it wet.
The eyes and eyelids are lined within a thin invisible membrane known as?
The conjunctiva
Ocul/o
roots
Def: eye
Ex: oculopathy
ophthalm/o
roots
Def: eye
Ex: ophthalmologists
note: It might sound nitpicky, but ophthalmo has two hs, not one. Many people think the root is OPthalmo but it is actually OPHthalmo.
opt/o *
roots
Def: eye
Ex: optometrist
lacrim/o
root
Def: tear
Ex: lacrimation
Note: often the term lacrimal is used interchangeably for the word tear. Keep in mind that the lacrimal gland and the tear gland refer to the same thing.
dacry/o *
root
Def: tear
Ex: dacryorrhea
Note: Although it isn’t the origin of the term, you may find it easy to remember that dacryo means “tear” because it has the word cry in the middle of it- daCRYo.
-opia *
suffix
Def: vision condition
Ex: hyperopia
-opsia *
suffix
Def: vision condition
Ex: akinetopsia
Notes: Akinetopsia = a + kinet + -opsia = no movement vision condition. It refers to a condition where patients are unable to see objects in motion.
blephar/o *
roots
Def: eyelid
Ex: blepharedema, blepharoplasty
Note: Blepharoplasty = blepharo + plasty = surgical reconstruction of the eyelid.
Also, remember that the ph is pronounced f. The word is blepharoplasty, not bleparoplasty
How many layers in the eye?
3
What does the outermost layer of the eye include?
The sclera and the cornea.
What is the sclera?
The sclera is the white part of the eye– a dense, protective layer, like the hard shell on the outside of the video camera
What is the cornea?
The cornea is a clear surface in the middle of the eye. Like the glass on a video camera, the cornea protects the lens and begins the work of focusing light to the back of the eye.
corne/o
roots
Def: cornea
Ex: corneal transplant
kerat/o *
roots
Def: cornea
Ex: keratitis
Notes: Kerato is a tricky root because it has multiple meanings. In the context of the eye, kerato means “cornea.” In the context of the skin, kerato refers to a horny texture to the skin. What’s the connection? Kerato comes from the Greek word meaning “horn” (think of a rhinoCEROS) and corneo comes from a Latin word meaning “horn” (think of a CORNUcopia, a horn of plenty). Apparently someone thought the cornea of the eye looked like an horn.
conjunctiv/o
roots
Def: conjunctiva
Ex: conjunctivitis
Notes: The conjunctiva is a clear membrane that covers the sclera and lines the eyelids. The root comes from two Latin words, con (with/together) and junct (join). Evidently, someone thought it joined the eye to the rest of the body.
scler/o
roots
Def: sclera (the white of the eye)
Ex scleritis
Notes: Just like kerato, sclera has multiple meanings. In other contexts, sclero means “hard” and can refer to the abnormal hardening of any tissue or organ. In the eye, it refers to the white, tough, and fibrous protective covering of the eye. Words having to do with they eye use sclero in both ways:
phacosclerosis: phaco + scler + osis = an abnormal hardening of the lens
scleromalacia= sclero+ malacia= an abnormal softening of the sclera.
What is the second layer of the eye called?
The choroid. This includes the lens, the iris, and the ciliary muscles.
What does the lens of the eyes do?
They gather light and focuses on images in the same way a lens on a camera does.
What is the iris?
The iris is what gives eyes their color. By expanding (dilating) or shrinking (constricting) the pupils, the irises control how much light hits the back of the eye.
What are the ciliary muscles?
The ciliary muscles adjust the shape of the eye and lens to focus on near or far objects. As light passes through the lens, it passes through liquid in the eye (vitreous) that bends the light and aims it to the back of the eyeball- all the way to the deepest layer, the retina.
What is the retina?
The innermost layer of the eye. It is the eye’s image processor. the retina helps turn visual stimuli into electrical signals. The collected information is then sent to the brain by electric signals along the optic nerve.
vitre/o
roots
Def: vitreous liquid (also called vitreous humor)
Ex. vitreous liquid, vitrectomy
Notes: the root vitreo means “glass” and refers to the liquid in the eye that helps focus light on the back of the retina.
You’re probably more familiar with the root vitreo in the term in vitro fertilization. This is the scientific word for a test-tube baby, an embryo that is fertilized not in the body but in vitro, which means “in a glass tube.”
cycl/o *
roots
Def: ciliary body
Ex: cycloplegia
Notes: the ciliary body is a circle of tissue surrounding the lens. One of its primary jobs is to change the shape of the lens of the eye in order to allow the eye to maintain focus, a process called accommodation. Someone who can’t read things close up without the help of glasses has ciliary bodies that are unable to sufficiently focus their lenses. When this happens in old age, it is called presbyopia.
retin/o
roots
Def: retina
Ex: retinitis, retinoscope
Notes: Retina comes from a word that means “net”; it refers to the netlike pattern of light-sensitive tissue on the inside surface of the eye.
ir/o *
roots
Def: iris
Ex: iritis
Notes: the iris is the colored part of the eye. It is responsible for adjusting the size of the pupil to control the amount of light that enters the eye.
In Greek mythology, Iris was a female messenger of the gods. She was the personification of the rainbow, which is why her name was given the colored part of the eye.
irid/o *
roots
Def: iris
Ex: iridalgia
phac/o
roots
Def: lens
Ex: phacoscope
Notes: Phaco is a Greek word meaning “lentil,” a type of bean, which is where we get the word lens.
Notice that phaco can be spelled with a c (phaco) or a k (phako). Because c sounds like s before i and e, the k sound is used sometimes to be sure the syllable is pronounced hard. For example, phacitis could be pronounced fah-SAI-tis. To avoid confusion, the word is sometimes spelled phakitis so it is pronounced fah-KAI-tis.
How does the ears work?
Ears work like stereo speakers in reverse. While stero speakers turn electrical signals into sounds (acouso, audio), ears (auro, oto) turn sounds into electrical signals. First, they collect sounds. Next, they turn the energy from the sound into movement, then they convert it again into electrical signals. Last, they send the signals to the brain, where it all gets sorted out into meaning.
aur/o *
roots
Def: ear
Ex: aural
Notes: If you learn better by hearing something than by reading it, then you are an aural learner. It’s easy to confuse aural with oral. But since oral means “mouth,” we guess an oral learner would be someone who learns by eating.
ot/o
roots
Def: ear
Ex: otoscope
Notes: The root oto is pronounced OH-toh, not AW-toh. An instrument a doctor uses to look in the ear is called an otoscope, which is pronounced OH-toh-skohp, not AW-toh-skohp.
acous/o *
roots
Def: sound, hearing
Ex: acoustic
Notes: Sound travels a 768 miles per hour. Thats about 12 miles per minute, or about 1 mile every 5 seconds, Light, however, travels a lot faster- 186,282 miles per second, which is about 5.6 million miles per minute, or more than 335 million miles per hour. That’s why you see a flash of lightning before you hear the thunder.
audi/o *
roots
Def: sound, hearing
Ex: audiogram
-acusis *
suffix
Def: hearing condition
Ex: hyperacusis, osteoacusis
Note: Have you ever wondered why your voice sounds different to you than it does to other people, or why you seem to sound different when you hear a recording of yourself? That’s because of osteoacusis (osteo + -acusis = bone hearing condition). When you speak, your voice passes through the air and hits other people’s eardrums. But it reaches your own ear in two very different ways– through the air, as it does for others, but also through the bones of your head. which is why you can hear yourself talk even if you plug your ears. Sound waves travel differently through bone than through air, so your voice sounds different to you than it does to other people.
How many main divisions are present for the ear?
1) the outer ear
2) the middle ear
3) the inner ear
What is the outer ear?
The outer ear inludes the pinna and the ear canal. The pinna is what we first think of when we think about the ear.
What is the pinna?
It is the fleshy part we pierce, tug on, and cover up in the winter. The pinna sits on the mastoid bone of the skull. Its funnel shape helps collect sound from the air and send it down the ear canal toward the eardrum (tympanic membrane).
What is the eardrum?
The eardrum is part of the middle ear and is a very important structure. It turns sound waves into physical energy. To keep the eardrum free from interference, the body protects it from both sides.
What does the ear canal produce?
From the outside of the eardrums, the ear canal produces ear wax (cerumen).
Why is the ear wax very helpful?
Despite its gross appearance, ear was is very helpful– it is a natural antibiotic and also a lubricant that keeps the ear canal moist. On the other side of the eardrum is a drainage system.
Describe the middle ear and its features?
The middle ear is connected to the nose and throat through a tube (salpinx). This tube helps drain the ear of any fluid and keeps the pressure inside the middle ear the same as outside the ear. Your eardrums is attached to three (3) bones that make up the rest of the middle ear.
What are the three bones in the middle ear?
The incus, stapes, and malleus (anvil, stirrup, and hammer). When the eardrum moves, these bone move too. They transfer their movement to the inner ear.
cerumin/o *
roots
Def: ear wax
Ex: ceruminolysis
Notes: Remember: C pronounced like an s before e and i and like a k before a, o, and u. So cerumen is pronounced SEH-roo-men.
salping/o *
roots
Def: eustachian tube
Ex: rhinosalpingitis
Notes: Salpingo is derived from the Latin word salpinx, which means “trumpet.” It refers to the long, straight kind used by Roman legions in battle, not the curvy kind with keys that is used today. This is important because salpingo is used in two body systems: in the ear, referring to the eustachian tubes, and in the female reproductive system, referring to the fallopian tubes. Both have long tubelike shapes.
And what are eustachian tubes? They connect the middle ear to the throat. Hold your nose, close your mouth, and blow. You’ll make your eardrum pop by forcing air into your middle ear through the eustachian tubes. Ear infections occur when the eustachian tubes are prevented from draining fluid out of the middle ear.
tympan/o *
roots
Def: eardrum (tympanic membrane)
Ex: tympanostomy
Notes: The root tympano comes from a Greek word meaning “drum.” Orchestras’ big kettledrums are called tympany, so “eardrum” is not a bad translation. If you take a peek inside someone’s ear sometime, you’ll proabably agree that it does resemble a drum.
myring/o *
roots
Def: eardrum (tympanic membrane)
Ex: myringotomy
mastoid/o
roots
Def: mastoid process
Ex: mastoiditis
Notes: Put your hand on the protruding part of your skull behind your ear- that’s the mastoid process. It sticks out from the side rear portion of the skull. Its name comes from mast (breast) + oid (resembling) = resembling a breast.
The bones of the middle ear are connected to what structure in the inner ear?
The cochlea
What is the cochlea in the ear?
A shell-shaped organ in the inner ear (labyrinth) filled with fluid and hair. When the stapes (pronouced STAY-peez) moves, it presses on the cochlea and causes the fluid to move. Just as the ocean waters move through seaweed, when the fluid moves, the hairs bend. The hairs, which are connected to the nervous system, create an electric signal carried by the acoustic nerve to the brain. Finally the brain receives and processes the electric signals.
What is another critical job of the inner ear?
Helping maintain balance.
The vestibular system sends info. to the brain about the tilt, rotation, and motion of the head. Like the cochlea, it is made up of small canals filled with fluid and hair. These hairs are moved not by sound but by movement and head angle. This helps maintain balance and also allows the brain to coordinate movement with the eyes.
labyrinth/o
roots
Def: labyrinth
Ex: labyrinthitis
Notes: The labyrinth is the innermost part of the ear. It contains two structures: the cochlea, which controls hearing, and the vestibular system, which controls balance.
The term labyrinth come from Greek mythology. It is the name of an elaborate maze built by King Minos to imprison the Minotaur, a half-man, half-bull creature.
vestibul/o
roots
Def: vestibule
Ex: vestibulitis
Notes: The term vestibule literally means “the lobby of a building.” Sometimes church lobbies are called vestibules. In medicine, vestibule refers to a small space at the beginning of a canal. In the ear, it refers to the area in front of semicircular canals (hence the name); it contains structures that help regulate balance.
cochle/o
roots
Def: cochlea
Ex: cochleitis
Notes: From Greek, for “snail shell,” the cochlea (pronounced KOH-klee-ah) is a sprial, snail shell-shaped tube in the inner ear that contains hearing receptors.
akinetopsia *
eye
vision-conditions-Opias
subjective
Def: inability to see objects in motion
Pron: uh-KEE-nah-TOP-see-ah
Word Analysis
a/ kinet/ opsia
no/ movement/ vision condition
ambiopia *
eye
vision-conditions-Opias
subjective
Def: double vision
Pron: AM-bee-OH-pee-ah
Word Analysis
ambi/ opia
both/ vision condition
amblyopia *
eye
vision-conditions-Opias
subjective
Def: decreased vision; when it occurs in one eye, it is referred to as lazy eye.
Pron: AM-blih-OH-pee-ah
Word Analysis
ambly/ opia
dull/ vision condition
asthenopia
eye
vision-conditions-Opias
subjective
Def: weak vision ( i.e., eye strain)
Pron: AS-then-OH-pee-ah
Word Analysis
asthen/ opia
weak/ vision condition
diplopia *
eye
vision-conditions-Opias
subjective
Def: double vision
Pron: dih-PLOH-pee-ah
Word Analysis
dipl/ opia
double/ vision condition
hemianopsia
eye
vision-conditions-Opias
subjective
Def: blindness in half the visual field
Pron: HEH-mee-an-OP-see-ah
Word Analysis
hemi/ an/ opsia
half/ no /vision condition
hyperopia
eye
vision-conditions-Opias
subjective
Def: farsightedness
Pron: HAI-per-OH-pee-ah
Word Analysis
hyper/opia
over/ vision condition
myopia
eye
vision-conditions-Opias
subjective
Def: nearsightedness
Pron: mai-OH-pee-ah
Word Analysis
my/ opia
shut/ vision condition
presbyopia *
eye
vision-conditions-Opias
subjective
Def: decreased vision caused by old age
Pron: PREZ-bee-OH-pee-ah
Word Analysis
presby/ opia
old age/ vision condition
scotopia *
eye
vision-conditions-Opias
subjective
Def: adjustment of the eye to seeing in darkness
Pron: skaw-TOH-pee-ah
Word Analysis
scot/ opia
darkness/ vision condition
blepharoplegia
eye
Eye-Outer Structures and Vision
subjective
Def: paralysis of the eyelid
Pron: BLEF-ah-roh-PLEE-jah
Word Analysis
blepharo/plegia
eyelid/ paralysis
blepharospasm
eye
vision-conditions-Opias
subjective
Def: involuntary contraction of an eyelid
Pron: BLEF-ah-roh-SPAZ-um
Word Analysis
blepharo/ spasm
eyelid/ involuntary contraction
dacryoadenalgia *
eye
vision-conditions-Opias
subjective
Def: pain in the tear gland
Pron: DAK-ree-oh-AD-en-AL-jah
Word Analysis
dacryo/ aden/ algia
tear/ gland/ pain
dacryocystalgia *
eye
vision-conditions-Opias
subjective
Def: pain in the tear sac
Pron: DAK-ree-oh-sis-TAL-jah
Word Analysis
dacryo/cyst/ algia
tear/ sac/ pain
dacryohemorrhea
eye
vision-conditions-Opias
subjective
Def: blood in the tears
Pron: DAK-ree-ooh-HIM-oh-ree-ah
Word Analysis
dacryo/ hemo/ rrhea
tear/ blood/ excessive discharge
dacryorrhea
eye
vision-conditions-Opias
subjective
Def: excessive tearing
Pron: DAK-ree-oh-REE-ah
Word Analysis
dacryo/ rrhea
tear/ excessive discharge
ophthalmalgia
eye
vision-conditions-Opias
subjective
Def: eye pain
Pron: awf-thal-MAL-jah
Word Analysis
ophthalm/ algia
eye/ pain
ophthalmoplegia
eye
vision-conditions-Opias
subjective
Def: eye paralysis
Pron: awf-THAL-moh-PLEE-jah
Word Analysis
ophthalmo/ plegia
eye/ paralysis
xerophthalmia
eye
vision-conditions-Opias
subjective
Def: dry eyes
Pron: ZER-off-THAL-mee-ah
Word Analysis
xer/ ophthalm/ ia
dry/ eye/ condition
astigmatism*
eye
eye-sclera
subjective
Def: vision problem caused by the fact that light rays entering the eye aren’t focused on a single point in the back of the eye.
Pron: ah-STIG-mah-TIZ-um
Word Analysis
a/ stigmat/ ism
no/ point/ condition
corneal xerosis
eye
eye-sclera
subjective
Def: dryness of the corea
Pron: KOR-nee-al ZER-oh-sis
Word Analysis
corne/ al xer/osis
cornea/ pertaining to dry/ condition
keratalgia
eye
eye-sclera
subjective
Def: pain in the cornea
Pron: KEH-rah-TAL-jah
Word Analysis
kerat/ algia
cornea/ pain
cycloplegia
eye
Eye-Choroid/ Retina
subjective
Def: paralysis of the ciliary body
Pron: SAI-kloh-PLEE-jah
Word Analysis
cyclo/ plegia
ciliary body/ paralysis
iridalgia
eye
Eye-Choroid/ Retina
subjective
Def: pain in the iris
Pron: IH-rid-AL-jah
Word Analysis
irid/ algia
iris/ pain
miosis *
eye
Eye-Choroid/ Retina
subjective
Def: abnormal contraction of the pupil
Pron: mai-OH-sis
Word Analysis
from Greek, for “to lessen”
mydriasis *
eye
Eye-Choroid/ Retina
subjective
Def: abnormal dilation of pupil
Pron: mi-DRAI-ah-sis
Word Analysis
from Greek, for “red-hot metal”
Note: We don’t really see the connection- do you?
scotoma *
eye
Eye-Choroid/ Retina
subjective
Def: dark spot in the visual field
Pron: skaw-TOH-mah
Word Analysis
scot/ oma
darkness/ tumor
hyperacusis
ear
Hearing Conditions- Acuses
subjective
Def: excessively sensitive hearing
Pron: HAI-per-ah-KOO-sis
Word Analysis
hyper/ acusis
over/ hearing condition
hypoacusis
ear
Hearing Conditions- Acuses
subjective
Def: excessively insensitive hearing
Pron: HAI-poh-ah-KOO-sis
Word Analysis
hypo/ acusis
under/ hearing condition
osteoacusis
ear
Hearing Conditions- Acuses
subjective
Def: hearing through bone
Pron: AW-stee-oh-ah-KOO-sis
Word Analysis
osteo/ acusis
bone/ hearing condition
presbycusis *
ear
Hearing Conditions- Acuses
subjective
Def: loss of hearing in old age
Pron: PREZ-bih-KOO-sis
Word Analysis
presby/ cusis
old age/ hearing condition
Note: The a in acusis was swallowed up by the y at the end of presby. The word is sometimes written as presbyacusis, but that’s a lot harder to pronounce.
mastoidalgia
ear
outer/ middle ear
subjective
Def: pain in the mastoid
Pron: MAS-toid-AL-jah
Word Analysis
mastoid/ algia
mastoid/ pain
otalgia
ear
outer/ middle ear
subjective
Def: ear pain
Pron: oh-TAL-jah
Word Analysis
ot/ algia
ear/ pain
otodynia
ear
outer/ middle ear
subjective
Def: ear pain
Pron: OH-toh-DAI-nee-ah
Word Analysis
oto/ dynia
ear/ pain
otorrhea
ear
outer/ middle ear
subjective
Def: discharge from the ear
Pron: OH-toh-REE-ah
Word Analysis
oto/ rrhea
ear/ excessive discharge
tinnitus
ear
inner ear
subjective
Def: ringing in the ears
Pron: tih-NAI-tis
Word Analysis
from Latin, for “to ring or jingle”
vertigo
ear
inner ear
subjective
Def: sensation of moving through space (while stationary)
Pron: VER-tih-goh
Word Analysis
from Latin, for “to whirl around”
ophthalmoscope
eye
Diagnostic procedure
Objective
Def: instrument for looking at the eye
Pron: awf-THAL-mah-SKOHP
Word Analysis
ophthalmo/ scope
eye/ instrument for looking
optomyometer
eye
Diagnostic procedure
Objective
Def: device used to determine the strength of eye muscles
Pron: AWP-toh-MAI-oh-MEE-tir
Word Analysis
opto/ myo/ meter
eye/ muscle/ instrument for measuring
phacoscope
eye
Diagnostic procedure
Objective
Def: instrument for looking at the lens
Pron: FAY-koh-SKOHP
Word Analysis
phaco/ scope
lens/ instrument for looking
retinoscope
eye
Diagnostic procedure
Objective
Def: instrument for looking at the retina
Pron: RET-in-aw-SKOP
Word Analysis
retino/ scope
retina/ instrument for looking
retinoscopy
eye
Diagnostic procedure
Objective
Def: procedure for looking at the retina
Pron: RET-in-AWS-koh-pee
Word Analysis
retino/ scopy
retina/ looking procedure
tonometer
eye
Diagnostic procedure
Objective
Def: instrument for measuring tension or pressure in the eye (intraocular pressure)
Pron: TOH-naw-MEE-tir
Word Analysis
tono/ meter
tension/ instrument for measuring
binocular
eye
Professional Terms
Objective
Def: pertaining to both eyes
Pron: bai-NAW-kyoo-lar
Word Analysis
bin/ ocul/ ar
two/ eye/ pertaining to
iridokinesis
eye
Professional Terms
Objective
Def: the movement of the iris
Pron: IR-ir-doh-kin-EE-sis
Word Analysis
irido/ kinesis
iris/ movement
lacrimation
eye
Professional Terms
Objective
Def: formation of tears (i.e., crying)
Pron: LAH-krih-MAY-shun
Word Analysis
lacrim/ ation
tear/ condition
nasolacrimal
eye
Professional Terms
Objective
Def: pertaining to the nose and tear system
Pron: NAY-zoh-LAH-krih-mal
Word Analysis
naso/ lacrim/ al
nose/ tear/ pertaining to
ophthalmic
eye
Professional Terms
Objective
Def: pertaining to the eye
Pron: awf-THAL-mik
Word Analysis
ophthalm/ ic
eye/ pertaining to
ophthalmologist
eye
Professional Terms
Objective
Def: eye specialist
Pron: AWF-thal-MAW-loh-jist
Word Analysis
ophthalmo/ logist
eye/ specialist