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102 Cards in this Set

  • Front
  • Back
exophthalmos
increase in the volume of the orbital content, causing a protrusion of the globes forward

caused by Graves disease or retroorbital tumor (unilateral)
episcleritis
inflammation of the superficial layers of the sclera anterior to the insertion of the rectus muscles; localized w/ a purplish elevation of a few millimeters

common manifestation of Crohn disease, RA, and other autoimmune disorders
band keratopathy
deposition of calcium in the cornea; appears as horizontal grayish bands; passes OVER the cornea

most common in patients with hyperparathyroidism; occasionally occurs in renal failure or syphilis
corneal ulcer
disruption of the corneal epithelium and stroma caused by viral or bacterial infection or by desiccation b/c of incomplete lid closure or poor lacrimal gland function; contact lenses increases risk of developing bacterial ulceration
strabismus
both eyes do not focus on an object simultaneously
non-paralytic strabismus can be the presenting sign of
infantile cataract or a retinoblastoma
miosis
pupillary constriction (< 2 mm)
contributing factors of miosis
iridocyclitis; pilocarpine - eye drops given for glaucoma
mydriasis
pupillary dilation (> 6 mm)
contributing factors of mydriasis
iridocyclitis; atropine eye drops; midbrain (reflex arc) lesions or hypoxia; oculomotor (CN III) damage; acute-angle glaucoma (slight dilation)
failure to respond to light stimulus
iridocyclitis; corneal or lens opacity, retinal degeneration, optic nerve (CN II) destruction, impairment of parasympathetic (efferent) fibers that innervate sphincter pupillae
Argyll Robertson pupil
bilateral miotic irregularly shaped pupils that fail to constrict with light but retain constriction with convergence

caused by neurosyphilis or lesions in midbrain where afferent pupillary fibers synapse
Anisocoria
unequal pupil size
contributing factors of anisocoria
congenital, amblyopia, or sympathetic or parasympathetic pupillary pathway destruction
iritis constrictive response
constriction of pupil accompanied by pain and circumcorneal flush; acute uveitis is commonly unilateral
oculomotor (CN III) damage
pupil dilated and fixed, eye down and out, ptosis
adie pupil
tonic pupil; affected pupil dilated and reacts slowly or not at all to light; responds to convergence; caused by impairment of postganglionic parasympathetic innervation to sphincter pupillae muscle or ciliary malfunction; often accompanied by diminished tendon reflexes (as with diabetic neuropathy or alcoholism)
Horner syndrome
ipsilateral miosis and mild ptosis; caused by interruption of the cervical sympathetic trunk due to mediastinal tumors, bronchogenic carcinoma, metastatic tumors, or operative trauma
cataracts
opacity of the lens caused by denaturation of lens protein with aging; lesion is central in aging, but peripheral in hypoparathyroidism
optic atrophy
death of nerve fibers and myelin sheaths; loss of central or peripheral vision or both; disc changes from yellow to white
background diabetic retinopathy
dot hemorrhages or microaneurysms and hard and soft exudates; hard exudates have sharply defined borders and are bright yellow; soft are caused by infarction of the nerve layer and are dull yellow spots with poorly defined margins (cotton-wool spots)
proliferative diabetic retinopathy
anoxic stimulation of new vessels; new vessels are likely to hemorrhage and cause blindness
lipemia retinalis
serum triglyceride exceeds 2000 mg/dl
BVs become pink and then white; seen in diabetic ketoacidosis
retinitis pigmentosa
development of night blindness and loss of peripheral vision; optic atrophy, narrowing of the arterioles, and peripheral "bone spicule" pigmentation
cytomegalovirus infection
hemorrhage, exudates and necrosis of the retina following the vascular pattern; causes blindness; "pizza pie" appearance in retina
glaucoma
elevated pressure caused by obstruction of the outflow of aqueous humor; acute glaucoma is accompanied by intense ocular pain, blurred vision, red eye, and dilated pupil; chronic - gradual loss of peripheral vision
chorioretinal inflammation
sharply defined lesion that is whitish yellow and stippled with dark pigment; caused by laser therapy for diabetic retinopathy, cytomegalovirus or toxoplasmosis during fetal life; visual field defect
choroidal nevus
darkened well-defined areas of varying size in the choroid
most common cause of blindness
interruption of vascular supply to optic nerve
bitemporal hemianopia
blindness in the outer half of both eyes caused by a lesion in the optic chiasm, most commonly a pituitary tumor
left homonymous hemianopia
blindness in the left half of visual field in both eyes
retinoblastoma
embryonal malignant tumor during first 2 years; caused by an autosomal dominant trait or chromosomal mutation; white reflex
retrolental fibroplasia
retinopathy of prematurity; BVs are straightened and diverted temporally
retinal hemorrhages in infancy
suspect infant abuse
when is the eye formed?
8 weeks
visual acuity of term infants
20/200, peripheral vision is fully developed
voluntary control of eye muscles
2-3 months
color differentiation
6 months
binocular vision
9 months
adult visual acuity
6 years
transitory fixation
2 weeks, distance of 3'
convergence begins to appear
8 weeks
beginning of depth perception
12 weeks
inspects own hands
16 weeks
discriminates geometric forms
52 weeks
accommodation well developed
2 years
Krukenberg spindles
corneal epithelial pigmentation seen during pregnancy
presbyopia
decreased accommodation when lens becomes rigid and the ciliary muscle of the iris weakens (by age 45)
diplopia
double vision resulting from a defect in ocular motility
visual acuity tests CN
II (optic)
numerator indicates
distance of pt. from chart
denominator indicates
distance at which the avg. eye can read the line
confrontation test evaluates
peripheral vision
fields of vision
nasally = 60 deg
temporally = 90 deg
superiorly = 50 deg
inferiorly = 70 deg
eyebrows that are coarse or do not extend beyond the temporal canthus
hypothyroidism
periorbital edema may indicate
hypothyroidism, allergies, or renal disease (especially in youth)
xanthelasma
elevated plaque of cholesterol deposited in the nasal portion of either the upper or lower lid
fasciculations of the lids of lightly closed eyes
hyperthyroidism
ptosis
drooping of eyelid; may be congenital or caused by weakness of levator muscle or paresis of CN III
ectropion
lower lid is turned away
entropion
lid is turned inward
hordeolum or sty
acute supparative inflammation of the follicle of an eyelash caused by staphylococci
blepharitis
crusting along eyelashes caused by bacterial infection, psoriasis, or an allergic response
lagophthalmos
closed lids do not completely cover globe
very firm eye
glaucoma, hyperthyroidism, or retroorbital tumor
pterygium
abnormal growth of conjunctiva that extends over the cornea from the limbus; common in people heavily exposed to UV light
corneal sensitivity is controlled by
CN V (trigeminal)
arcus senilis
lipids deposited in the periphery of the cornea; seen in majority of individuals over 60; before 40 may indicate type II hyperlipidemia
failure to respond to direct light but retaining constriction during accommodation
diabetes or syphilis
miosis is caused by
morphine and glaucoma drugs
yellow or green sclerae
liver disease
dark, rust-colored pigment just anterior to the insertion of the medial rectus
senile hyaline plaque, does not imply disease
enlarged lacrimal gland
sarcoid disease and Sjogren syndrome
eye moves rapidly to the right and then slowly drifts leftward
nystagmus to the right
lid lag
exposure of sclera above the iris may indicate hyperthyroidism
papilledema
loss of definition of the optic disc (initially occurs superiorly and inferiorly) caused by increased intracranial pressure transmitted along the optic nerve; central vessels are pushed forward and veins are markedly dilated
glaucomatous cupping
increased intraocular pressure and the consequent interruption of the vascular supply to the optic nerve; peripheral visual fields are constricted
drusen bodies
small discrete spots that are slightly pinker than the retina; consequence of aging and may be precursor of macular degeneration
hemorrhage at the disc margin
glaucoma
flame-shaped hemorrhages occur in the
nerve fiber layers
dot hemorrhages
diabetic retinopathy
Group I
widened arteriolar light reflex
Group II
AV nicking; arterioles are reduced to half usual size
Group III
shiny retina and cotton wool spots which represent ischemic infarcts of retina
group IV
papilledema
elevated outer canthi
mongolian slant
sunsetting sign
rapidly lower infant from upright to supine position; sclera above the iris may be observed in infants with hydrocephalus and brainstem lesions
Brushfield spots
white specks scattered in a linear pattern around the entire circumference of the iris - Down syndrome or mental retardation
opacities or interruption of the red reflex
congenital cataracts or retinoblastoma
2-line difference in visual acuity may indicate
amblyopia
segmental arteriolar narrowing with a wet, glistening appearance indicative of edema
pregnancy-induced hypertension
follows large, conspicuously moving objects
4 weeks
convergence begins to appear
8 weeks
shows interest in stimuli > 3' away
20 weeks
hand-eye coordination appearing
24 weeks
tilts head backward to gaze up
40 weeks
erythematous or cobblestone conjunctiva may indicate
allergic or infectious conjunctivitis
blinking requires which nerves to be intact?
CN V and motor fibers of CN VII
hypertelorism
wide space b/w the eyes may be associated with mental retardation
coloboma
keyhole pupil; often associated with other congenital anomalies
at 3 y/o what visual acuity warrants referral to an ophthalmologist
20/50 or worse
at 5 y/o what visual acuity warrants referral to an ophthalmologist
20/30 or worse