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