Phys assess #3 Flashcards
Sensory organ for vision-
Eyes
Important for functioning and ability to perform
Eyes
Transparent protective cover of the eye is the ___
cornea
Lacrimal apparatus-
irrigates the eye by producing tears
Movement of the extraocular muscles stimulated by
three cranial nerves
Cranial nerve VI (6):
abducens nerve, innervates lateral rectus muscle, which abducts eye
Cranial nerve IV (4):
trochlear nerve, innervates superior oblique muscle
Cranial nerve III (3):
oculomotor nerve, innervates all the rest: the superior, inferior, and medial rectus and the inferior oblique muscles
There are _ muscles that move the eye and keep it straight and rotate
6
Each muscle makes sure both eyes move together, known as _____ (eyes remain parallel)
conjugate movement
Parallel axis is important for eye movement bc the human brain is ____ or a single image visual system
Binocular
Both eyes creating one image in the brain
Binocular/Single image visual system
Follow movement of pen light or object proceeding clockwise.
Six cardinal positions of gaze
Assess for potential extra ocular muscle (EOM) weakness, nystagmus or lid lag.
Six cardinal positions of gaze
Normal response is eyes being able to track the movement parallel
Six cardinal positions of gaze
Weakness in cranial nerve or muscle dysfunction if the eyes do not move parallel
Six cardinal positions of gaze
Three concentric coats of the eye
Outer, middle, and inner coat
Outer coat
Sclera and cornea
Middle coat
Choroid, pupil, and the anterior and posterior chambers of the lens
Inner coat
Contains the retina
Internal Anatomy: Outer Layer
Sclera, Cornea, Corneal reflex, Trigeminal nerve, Facial nerve
Sclera:
tough, protective, white covering.
Continuous anteriorly with smooth, transparent cornea, which covers iris and pupil
Sclera
Cornea:
part of refracting media of eye, bending incoming light rays so that they will be focused on inner retina.
Corneal reflex—
contact with a wisp of cotton stimulates a blink response in both eyes simultaneously.
Trigeminal nerve-
cranial nerve V, sending message from corneal reflex to the brain, carries afferent sensation into brain.
Facial nerve-
cranial nerve VII, causes the blink reflex, carries efferent message that stimulates blinking
Sensitive to touch-
cornea and sclera
Internal Anatomy: Middle Layer
Choroid, Iris, Muscle fibers, Pupil changes, Lens
Choroid:
has dark pigmentation to prevent light from reflecting internally and is heavily vascularized to deliver blood to retina
Iris:
Functions as a diaphragm, varying opening at its center
The pupil changes size in order to control amount of ___ in the pupil.
light
Dilates when light is dim and focus on far vision.
Constricts when light is bright and focus on near vision.
Pupil
Budges to see near objects.
Flatten to focus on far objects.
Lens
Muscle fibers of iris contract pupil in ____
bright light and to accommodate for near vision
Pupil:
round and regular; size determined by balance between parasympathetic and sympathetic chains of autonomic nervous system
Stimulation of parasympathetic branch, through ____, causes constriction of pupil.
cranial nerve III
Stimulation of sympathetic branch
dilates pupil and elevates eyelid.
Pupil size also reacts to amount of ___ and to accommodation, or focusing an object on retina.
ambient light
The fight or flight mode is responsible for
constriction and dilation of the pupils
Lens:
biconvex disc located just posterior to pupil
Different pupil size can occur up to 20% of population.
Anisocoria
Can indicate glaucoma, brain bleed, traumatic brain injury, cancer, or concussion.
Anisocoria
Transparent; it serves as a refracting medium, keeping a viewed object in focus on retina
Lens
Anterior and posterior chambers contain clear, watery aqueous humor produced continually by ciliary body.
Lens
Continuous flow of fluid serves to deliver nutrients to surrounding tissues and to drain metabolic wastes.
Lens
Intraocular pressure determined by balance between amount of aqueous produced and resistance to outflow
Lens
Internal Anatomy: Inner Layer
Retina, Optic disk, Retinal vessels, Macula
Retina:
the visual receptive layer of eye where light waves change into nerve impulses
Retinal structures viewed through ophthalmoscope are
optic disc, retinal vessels, general background, and macula.
Optic disc:
area in which fibers from retina converge to form optic nerve
Located toward nasal side of retina, it has characteristics specific to color, shape and margins
Optic disc
Retinal vessels:
normally include a paired artery and vein extending to each quadrant.
Receiving and transducing light from central field
located on temporal side of fundus
Macula:
Slightly darker pigmented region surrounding fovea centralis, area of sharpest and keenest vision
Macula:
Receives and transduces light from center of visual field
Macula:
Image that is formed on the retina is going to be
upside down and reversed
normal constriction of pupils when bright light shines on retina.
Pupillary light reflex
Note direct and consensual pupillary constriction.
Pupillary light reflex
Subcortical reflex arc with no conscious control
Pupillary light reflex
a reflex direction of eye toward an object attracting a person’s attention
Fixation:
Image fixed in center of visual field, the fovea centralis
Fixation:
adaptation of eye for near vision.
Accommodation:
Accomplished by increasing curvature of lens through movement of ciliary muscles
Accommodation:
Although lens cannot be observed directly, the following components of accommodation can be observed:
Convergence (motion toward) of the axes of the eyeballs
Pupillary constriction
Responses to pupillary light reflex under the influence of alcohol, drugs, fatigued, or not paying attention can show
abnormal movements
____ vision is intact in newborn infant.
Peripheral
Macula, area of keenest vision, is absent at birth but mature by
8 months.
By ___ months of age, infant establishes binocularity. Before that age the muscles are not that strong (cross-eyed).
3 to 4
Can fixate on a single image with both eyes simultaneously
binocularity
Lens is nearly spherical at birth.
Growing flatter throughout life
Consistency changes from that of soft plastic at birth to rigid glass consistency in old age.
Lens
Eye function is limited and movement is poorly coordinated
at birth
Age-related farsightedness
Presbyopia
Lens loses elasticity, becoming hard and glasslike, which decreases ability to change shape to accommodate for near vision.
Presbyopia
Accommodation is lost so it effects near vision.
Presbyopia
Most common causes of decreased visual functioning in older adults are the following:
Cataract formation, Glaucoma, Age-related macular degeneration (AMD), Diabetic retinopathy
Clouding or lens opacity, resulting from a clumping of proteins in lens
Cataract
Decreased peripheral vision and will compensate by turning their head
Glaucoma
Increased intraocular pressure- Chronic open-angle glaucoma is most common type.
Glaucoma
Complain of almost tunnel vision changes that are gradual.
Glaucoma Late stages-
Breakdown of cells in macula of retina; loss of central vision
Age-related macular degeneration (AMD)
Leading cause of blindness in adults ages 25 to 74 years of age.
Diabetic retinopathy
Pupil size decrease by the age of __
70
Normal transparent clean lens will begin to thicken and yellow which begins formation of
cataracts
Visual acuity diminishes gradually after age __ and more after age of __
50, 70
Open angle glaucoma
Obstructed drainage canal
Closed angle glaucoma
Pressure pushes iris against cornea
most common, no s/sx at the beginning
Open angle
Glaucoma is caused by increased
intraocular pressure
The iris may appear bulging because the aqueous humor cannot circulate throughout the eye and the pressure is increased
Glaucoma
Peripheral vision effected
Glaucoma
Affect central part of vision
Age-related macular degeneration (AMD)
Most common cause of blindless characterized by the loss of central vision
Age-related macular degeneration (AMD)
Its not consistent with vision that is considered normal at any age- not a common finding
Age-related macular degeneration (AMD)
Culturally based variability present in color of
iris and retinal pigmentation
___ are a leading cause of blindness worldwide.
Cataracts
Estimated that 80% are preventable or curable with surgery
Cataracts
Glaucoma incidence increases with __
age.
Glaucoma: African Americans ___ times more likely to develop than Caucasian Americans.
3-6
Culture and Genetics
Age-related macular degeneration
Visual Impairment-
defined by the inability of seeing letters on eye chart at 20/50 or below
Primary angle glaucoma- primary cause of blindness in ___
African Americans and Hispanics
Risk factors for primary angle glaucoma
Positive family history, smoking, light iris color, hypertension, high cholesterol and being female
Visual screenings important for school aged children for safety and address eye issues at early age, helps detect ____
cross eye and lazy eye in children
Patients may complain of shadow or diminished vision in one quarter to one half of visual field.
Retinal detachment
If occurs after trauma or injury it is considered an emergency.
Retinal detachment
Occurs bc part of retina has pulled away from support system
Retinal detachment
Eyes Objective Data
Preparation, Position a person standing for vision screening; then sitting up with head at your eye level.
Snellen eye chart Equipment needed:
Handheld visual screener
Opaque card or occluder
Penlight
Applicator stick
Ophthalmoscope
most commonly used and most accurate for visual acuity
Snellen eye chart
normal vision
20/20
visual impairment
20/50
Stand person 20 ft away from chart
Snellen eye chart
if pt has glasses or contacts leave on but if reading glasses take off
Snellen eye chart
Read smallest line of letter possible
Snellen eye chart
If unable to see the largest letters going to shorten the distance from the chart.
Snellen eye chart
If the pt is 10 ft away document it was
10/20
If acuity ___ you can read 20 feet but others normally can see 30
20/30
considered legally blind
20/200
Also known as the Hirschberg test
Corneal Light Reflex
Assess parallel alignment of eye axes by shining a light toward the person’s eyes.
Corneal Light Reflex (Hirschberg test)
Direct the person to stare straight ahead as you hold the light about 30 cm (12 inches) away.
Corneal Light Reflex (Hirschberg test)
Note reflection of light on corneas; should be in exactly same spot on each eye.
Corneal Light Reflex (Hirschberg test)
If any asymmetry can identify deviation of the eye muscles or paralysis
Corneal Light Reflex (Hirschberg test)
Perform cover test is asymmetric. The covered eye must response to reflex
Corneal Light Reflex (Hirschberg test)
If child has untreated strabismus can lead to
permanent visual damage
Younger than ___ could see some types of abnormalities bc muscles are not strong enough yet
6 months
Ask the person to look up; using thumbs, slide lower lids down along orbital rim, being careful not to push against eyeball.
Conjunctiva and Sclera
Inspect exposed area; eyeball should look moist, white, and glossy.
Conjunctiva and Sclera
Numerous small blood vessels normally show through
transparent conjunctiva.
Otherwise, conjunctivae clear and show normal color of structure below;
pink over lower lids and white over sclera.
Note any color change, swelling, or lesions.
Conjunctiva and Sclera
Be aware of ethnic variations.
Conjunctiva and Sclera
Ask the person to look down; with thumbs, slide outer part of upper lid up along bony orbit to expose under lid; inspect for any redness or swelling.
Lacrimal Apparatus
Normally puncta drain tears into
lacrimal sac.
Presence of excessive tearing may indicate blockage of
nasolacrimal duct.
Check by pressing index finger against sac, just inside lower orbital rim, not against side of the nose.
Lacrimal Apparatus
Pressure will slightly evert lower lid, but there should be no other response to pressure.
Lacrimal Apparatus
Tear duct
Lacrimal Apparatus
Shine light from side across cornea and check for
smoothness and clarity.
Oblique view highlights any abnormal irregularities in corneal surface.
Cornea and Lens
Should not be cloudiness or opacities
Cornea and Lens
___ a common finding in geriatric pts, opacity around the cornea
Arcus senilis
Note size, shape, and equality of
pupils
Normally pupils appear
round, regular, and of equal size in both eyes
Normal response includes
pupillary constriction.
convergence of axes of eyes.
Test for accommodation by asking the person to focus on a
distant object
Record normal response to all these maneuvers as PERRLA, or
Pupils Equal, Round, React to Light, and Accommodation.
Muscle fibers of the iris are going to contract the pupil in
bright light
Accommodate for near vision, when contracts allow pupil to
constrict
May have smaller pupils and slower responses-
older adults, constriction should be symmetric
Poor coordinated eye movement
Newborns
In newborns, ___ common; eyes appear to deviate down with white rim of sclera visible over iris
setting-sun sign
Many infants have an ___, an excess skinfold extending over inner corner of eye, partly or totally overlapping inner canthus.
epicanthal fold
Iris normally blue or slate gray in light-skinned newborns and brown in dark-skinned infants;
by 6 to 9 months, permanent color differentiated
When assessing children use appropriate assessment for
developmental stage
Adults: Eyes may appear sunken from atrophy of
orbital fat
Orbital fat may herniate, causing bulging at
lower lids and inner third of upper lids.
____ may decrease tear production, causing eyes to look dry and lusterless and the person to report a burning sensation.
Lacrimal apparatus
__ may look cloudy with age
Cornea
Arcus senilis is commonly seen around cornea.
Can be common caused by deposits of lipid material.
Lower eye lids droopy- muscle fiber looses elasticity and roll outward. can complain of dry and itchy.
Ectropion
Hordeolum (Stye)
Hordeolum (Stye)
Localized staph infection
Hordeolum (Stye)
Affects hair follicle along lid margin
Hordeolum (Stye)
Painful, red, swollen
Hordeolum (Stye)
Contagious and rubbing eye can cause cross-contamination
Hordeolum (Stye)
Recommend warm compresses, wash hands, do not rub both eyes, topical antibiotics
Hordeolum (Stye)
Acute localized staph infection that occurs at hair follicles are lid margin
Hordeolum (Stye)
Caused by blunt trauma.
HYPHEMA
Can also results from herpes zoster infection.
HYPHEMA
Can see blood in anterior chamber in the eye and gravy cause blood to settle in front of the iris.
HYPHEMA
External portion of the ear-
Pinna or auricle
Consists of movable cartilage and skin
Ear
Auditory canal-
slight s curvature in the adult patient
External Ear Called the
auricle or pinna
serves as a funnel for sound waves into its opening, shape of the canal
External auditory canal
2.5-3 cm in length
Auditory canal
Extends to the ear drum
Auditory canal
Lined with glands that secrete cerumen that lubricate and protect ear
Auditory canal
Outer one third of canal is cartilage
Auditory canal
inner two thirds of the tunnel is covered by
very thin and sensitive skin
Also called the eardrum
Tympanic Membrane
Translucent membrane with a pearly gray color
Tympanic Membrane
Oval and slightly concave, pulled in at its center by one of middle ear ossicles, the malleus- parts that show through the eardrum called the umbo, manubrium, and short process.
Tympanic Membrane
Separates external and middle ear-
tympanic membrane
Tiny air-filled cavity inside temporal bone
Middle Ear
Middle Ear contains tiny ear bones, or auditory ossicles:
Malleus
Incus
Stapes
Several openings are present.
Middle Ear
To the outer ear and inner ear eustachian tube:
opening that connects middle ear with nasopharynx and allows passage of air
Normally closed, but opens with swallowing or yawning
Tubea
Conduct sound vibrations from outer ear
Function of middle ear
To central hearing apparatus that is located in the inner ear
Function of middle ear
Protects inner ear by reducing amplitude of loud sounds
Function of middle ear
Allows equalization of air pressure on each side of the tympanic membrane to prevent rupturing
Function of middle ear
Contains the bony labyrinth, which holds sensory organs for equilibrium and hearing.
Inner Ear
Cochlea contains central hearing apparatus.
Inner Ear
Not assessable for direct examination can still assess function of it
Inner Ear
Auditory system can be divided into three levels
Peripheral, Brain Stem, Cerebral Cortex
Amplitude:
loudness
Frequency:
pitch or number of cycles per second
Sound waves produce vibrations on __
Tympanic membrane
Ear transmits sounds and convert sounds into
vibrations.
Then turns them into electrical impulses that the brain analyzes-
Peripheral
Sensory organ of hearing, Numerous fibers on membrane.
Organ of corti
Hair cells bend and mediate vibrations into the
electrical impulses.
The electrical impulses conducted by the auditory portion of
cranial nerve 8 to the brain stem
Function at brainstem level is
binaural interaction
Locates direction of a sound in space, as well as identifying the sound
binaural interaction
___ from each ear sends signals to both sides of brainstem, which are sensitive to differences in intensity and timing of messages from two ears, depending on way head is turned
Cranial nerve VIII
Normal pathway of hearing is _____ described previously; it is the most efficient.
Air conduction (AC)
Alternate pathway of hearing is by
Bone conduction (BC)
Bones of the skull vibrate and are transmitted directly to inner ear and to cranial nerve VIII.
Bone conduction (BC).
___ is to interpret the meaning of that sound and begin appropriate response.
Function of cortex
Hearing loss is anything that
obstructs transmission of sound and effects hearing
Types of hearing loss
Conductive, Sensorineural/Perceptive, Mixed hearing loss
Mechanical dysfunction of external or middle ear.
Conductive hearing loss
Known as partial loss bc if the sound amplitude is increased high enough then the pt will be able to hear it
Conductive hearing loss
Can be caused by impacted cerumen, foreign bodies in the ear canal, perforated tympanic membrane, or any other puss or serum located within the middle ear.
Conductive hearing loss
Can be caused by otosclerosis
Conductive hearing loss
Indicate pathology of the inner ear, Cranial nerve 8, or the auditory areas of the cerebral cortex.
Sensorineural/Perceptive) hearing loss
If increasing amplitude the pt will not be able to hear it.
Sensorineural/Perceptive) hearing loss
Can be caused by presbycusis or other ototoxic drugs that effect hear cells in cochlea.
Sensorineural/Perceptive) hearing loss
Antibiotics, loop directs, nsaids and other cancer treatments- ototoxic
Sensorineural/Perceptive) hearing loss
Mixed hearing loss: both conductive and sensoineural within same ear.
Mixed hearing loss
Inner ear starts to develop early in __ of gestation.
5th week
Early development ears
posteriorly rotated and low set
Can effect hearing in infants-
rubella.
Early during first trimester can harm organ of corti and impair hearing to the fetus.
rubella.
Estuation tube is ___ position in infant.
shorter than, wider and more horizontal
Increases middle ear infections
Estuation tube in infants/Children
Lumen surrounded by lymphoid tissue, which increases during childhood and is
easily occluded.
Infant’s and young child’s external auditory canal is __ to that of adults.
shorter and has a slope opposite
Short and flat, easier for viruses to get in
Infant eustachian tube
More angular, hard for viruses to get in from the nose
Adult eustachian tube
Obstruction of eustachian tube or passage of nasopharyngeal secretions into middle ear
Otitis Media
Common illness in children
Otitis Media
Otitis media risk factors
Drinking bottles when sleeping, not being breastfed first month of life, 2nd hand smoke, attending day care, premature, male gender, fall and winter season.
Increased ambulatory visits
Otitis Media
Persistent effusion may lead to hearing loss.
Otitis Media
Genetic variation regarding
cerumen development
Caucasians and African American-
honey brown and dark down consistency, wet cerumen
Asians and American Indians-
Dry and flakey cerumen with gray
Ears Subjective Data
Earache
Infections
Discharge
Hearing loss
Environmental noise
Tinnitus
Vertigo
Patient centered are
Hearing loss-
gradually or recently/quickly
Environmental noise-
damage to hearing
Tinnitus-
comes within the person, describe as ringing of crackling or buzzing sound. complaint of- is it louder when no other noise is present.
Vertigo-
dizziness, room spinning
Low speech pt cannot hear it.
If increase volume or make louder for them can be very painful for pts
At what age was child’s first episode?
Infants and Children Ear infections
Has child had any surgery, such as insertion of ear tubes or removal of tonsils?
Infants and Children Ear infections
Does anyone in the home smoke cigarettes?
Infants and Children Ear infections
Does child receive care outside your home?
Infants and Children Ear infections
Does child seem to be hearing well?
Infants and Children hearing problems
Have you noticed that infant startles with loud noise?
Infants and Children hearing problems
Increased risk for developing recurrent ear infections if first episode of ear infection is before age of
3 months
To determine recurrent otitis media-
3 episodes with in 3 months, 4 within last year, total, and how they treated
Address problems early bc they are at grater risk for hearing loss, delayed speech, social development issues, and learn deficits.
Infants and Children
Inspect and palpate external ear
Size and shape
Skin condition
Tenderness
External auditory meatus
Skin color consistent with the person’s facial skin color
Skin intact, with no lumps or lesions
Skin condition
Note size of opening to direct choice of speculum for otoscope; no swelling, redness, or discharge should be present.
External auditory meatus
Some cerumen usually present with color and texture variation
External auditory meatus
Should feel firm and produce no pain upon palpation
Pinna
As you inspect external ear, note size of
auditory meatus.
Choose largest ___ that will fit comfortably in ear canal.
speculum
Pull pinna up and back on an adult or older child to straighten
S-shape of canal.
Pull pinna down and back on an infant and a child
under 3.
Hold pinna gently but firmly; do not release traction on ear until you have
finished examination and removed otoscope.
Insert speculum
slowly and carefully
Last, perform otoscopic examination before you
test hearing.
Never touching boney section of canal wall bc its
very sensitive
If impacted cerumen can give pt sense of
pathologic hearing loss
Note any redness and swelling, lesions, foreign bodies, or discharge.
External Canal
Frank blood or clear, watery drainage (cerebrospinal fluid [CSF]) after head injury suggests
basal skull fracture and warrants immediate referral.
If any discharge is present note
color and odor.
Loss of hearing esp. upper respiratory infection needs to be
reported and followed up immediately
Tympanic Membrane (Ear Drum) Color and characteristics
Shiny pearl grey translucent
Cone-shaped light reflex prominent in anteroinferior quadrant, a reflection of the otoscope light
Tympanic Membrane (Ear Drum)