anterior pole - dr. scott burdette
TRANSCRIPT
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Lost in (the front)Your Eyes…
Anterior Pole
Senior Grand Rounds Presentation – Scott Burdette MD, MS
http://www.imisstheoldschool.com/archives/debbie-gibson-talks-25-years-since-electric-youth-to-billboard/
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Why this?I had ommatophobia, a fear of eyes.
In regards to the ER
I hated it, despite finding bewilderment in
learning about them
Afraid of a horrible mistake – couldn’t imagine
being blind
How better to become more comfortable than to
do my grand rounds on it
We will be talking about the anterior pole
But since it’s in-service time I’ll throw in some
other buzz words
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Case Presentation55 year old Caucasian female
Three days of worsening unilateral right sided
temple pain
Frontal HA w/ nausea and worsening blurry vision
Began at home while reading on porch
http://en.wikipedia.org/wiki/Glaucoma
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What is it?Failure of drainage of trabecular system
Aqueous humor produced by ciliary bodies in
posterior segment
Circulate to anterior chamber
Reabsorbed through trabecular meshwork into
Canal of Schlemm
Drains into episcleral veins
Can cause loss of vision due to compression of
optic disc
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Glaucoma
http://www.tedmontgomery.com/the_eye/eyephotos/index-grphc.html
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Types of GlaucomaPrimary
Pupillary block
Posterior iris contracts against lens which
blocks humor flow from posterior to anterior
Pushes iris forward blocking meshwork
Secondary block
Uveitis
DM
Lens size malformations
Drugs (Topiramate/sulfas)
Choroid swelling (CRVO/post laser tx)
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Risk Factors/PrecipitantsAge: especially greater than 60
Female
Hyperopia: eyeball too shallow/or cornea has too little curvature
FMH
Race: AsianHispanicAfrican American: 6-8* that of whites
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PrecipitantsTopical mydriatics
Anticholinergic/sympathomimetic
Emotional stimuli
Accommodation
Dim lights
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ExaminationDecreased VA
Pupil: fixed. Possibly irregular. Dilated.
Eye: Red. Serous discharge and corneal edema (both variable)
Slit lamp: shallow AC (closed). Injected conjunctiva. Corneal edema.
Tonometry : increased IOP
Normal 10-20
Fundoscopy
Impressive cupping
Spontaneous arterial pulsations
Rule out other pathology
Another can’t miss with potentially similar story
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Impressive cupping
http://www.tedmontgomery.com/the_eye/eyephotos/index.html
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Impressive Cupping
http://www.tedmontgomery.com/the_eye/eyephotos/index.html
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ManagementOphthalmology Consult
Topical B-blocker: decreases production
Timolol: 1-2 drops of 0.5%
Carteolol
Topical cholinergic: miotic – contract ciliary muscle to
open meshwork
Pilocarpine: 2% for blue eyes and 4% for brown eyes
Give one hour post: pressure induced iris paralysis
Alpha Agonsit: decrease production and facilitate flow
Apraclonidine: 1% w/ 1-2 drops as single dose
CA inhibitor: decrease humor production
Acetazolamide: 500mg IV followed by 500mg PO
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Management (cont.)Symptomatic Treatment
PRN antiemetics: to avoid further elevation of IOP
PRN analgesia
Elevate the HOB
Other Adjuncts
Topical steroids: prednisolone acetate 1%
Needling/corneal indentation
Ophthalmologist put needles into iris of patient in NZ
Reassessment: goal is 25% reduction from initial
presentation
Mimics?
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Interesting FactsPeople with blue eyes have higher etOH
tolerance
….and abuse/addiction
http://www.unt.edu/rss/class/mike/5700/eyecol
oralcohol.pdf
All blue eyed people can be traced back to one
person living next to the black sea 10,000 years
ago; a polygenic trait – recessive like
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Black Lemurs are the only other primate,
besides humans, to have blue eyes
http://www.independent.co.uk/environment/nature/on-the-brink-of-extinction-ndash-25-of-our-closest-relatives-1902990.html?action=gallery
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Case Presentation2 year old chesty white male went to see Hardwell at
EDC Vegas. Danced all night to sweet drops. Pit was
cray, tons of fist pumps – caught one in the eye due to
looking so buff in his pink tank. Presents to ED with
complaints of red eye and “something in it”.
http://imagebank.asrs.org/file/7602/silicone-oil-in-anterior-chamber-with-hyphema
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What is it?Hyphema
A collection of blood in the anterior chamber
Layers on position if not clotted
Risk Factors/Precipitants
DM neovascularization or recent surgery –
spontaneous
Sports without occular protection/Trauma
Sickle cell disease
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Hx/PESickle cell?
Anticoagulation?
Trauma hx?
PE
Visual acuity
External examination: what is the percentage of
collected blood
Pupil reactivity
Tonometry
Slit lamp: Measure height, Assess for clots. Rule
out penetrating injury
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Hyphema GradingGrade 1: layered up to 33% of anterior
chamber
Grade 2: layered 33% to 50%
Grade 3: layered from 51% to less than
100%
Grade 4: complete obliteration of anterior
chamber
AKA 8-ball hyphema
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ManagementImaging not necessary unless concern for bony injury
Tx
Symptomatic tx: Analgesia and Antiemetics
Topical cycloplegics
Positioned upright: to avoid trabecular meshwork
occlusion
Eye shield
Complications
Secondary glaucoma – treat if it arises
rebleeding
What is the Disposition?
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DispositionMost can go home
Follow up with ophthalmology in 24
hours
Admit
Those you don’t trust
Sickle cell patients
Those with secondary glaucoma
Other blood dyscrasias
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Interesting FactsYour eye is the equivalent of a 576
megapixel camera
The human eye can distinguish about
10 million colors
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Case Presentation33 year old male with eye trauma earlier today
while playing basketball. Dull ache of left eye
with light sensitivity, crying sensation, and
redness. Feels as if his vision is continually
worsening.
http://quizlet.com/20574046/pathoma-ent-flash-cards/
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What is It?Iritis
Subset of uveitis
Uvea: choroid, ciliary body, and iris
Iris and ciliary body: iridocyclitis
Iritis: just iris
Types
Inflammatory: HLA B27, sarcoid, MS, bechets,
and kawasaki
Infectious: CMV, TB, syphilis, and lyme disease
Traumatic (this case)
Drug Induced (ie sulfas)
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Exam FeaturesPupil with ciliary flush
Circumferential involvement of injected cornea
How is this different than conjunctivitis?
Painful red eye – often exacerbated with movements. May have irregular pupil
VA: may be normal to blurred
EOM: normal
Pupil: miosis
Direct and consensual photophobia
Cell and flare on slit lamp
Tonometry – to rule out glaucoma
Other symptoms: joints and pulmonary
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Cell and Flare
https://roshreview.com
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Uveitis Types
http://www.eyecalcs.com/DWAN/pages/v4/v4c032.html
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Treatment/DispoTopical Steroids
Prednisolone 1% (pred forte)
Be vary wary
Increased IOP
Potentiate herpes keratitis or bacterial infection
Cycloplegics
Cyclopentolate (cylogyl)
Homatropine (isopto)
Ophthalmology referral
If original uncomplicated presentation – f/u in 24
hours
Refractory/infectious - admission
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Asleep at the wheel?We spend 10% of out waking hours with
our eyes closed – blinking
You blink, on average, 12 times per
minute
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Case PresentationAn 88 year old female 6 weeks post cataracts
surgery complaining of a red and itchy eye.
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HypopyonLeukocyte collection in anterior chamber – most exogenous
Types:
Staph (coagulase negative) – common post cataracts surgery
Most due to exogenous flora in other countries but surgery most common in US; 70%
Staph aureus 10%
Bacillus cerus – post traumatic (TETANUS!!)
Endocarditis – staph aureus/strep spp
Fungal – candida
HSV
A subset of endopthalmitis
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EndopthalmitisSurgical endopthalmitis occurs in 0.1-0.2 percent
of eye surgeries; cataracts being most common
Complication usually occurs within 6 weeks
However 75% within the first week
Keep in mind – some sterile inflammation
immediately following surgery
Labs usually don’t help
Less than 1/3 usually have white count over
10K
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Symptoms/other
considerationsPain, itching, and photophobia; can have
decreased VA
Outside of bacteria
Bechet’s
Keratitis
Malignancy
Trauma
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Exam/DispositionExam: white cells layered in AC. Red eye.
Chemosis. Lid edema. Conjunctival injection.
Treatment/disposition
Ophthalmology consult – potential for vision
loss
3rd generation cephalosporin
(pneumococcus is common)
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Interesting FactsHumans and dogs are the only two
species to seek visual cues from other’s
eyes; dogs only do so with humans.
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http://www.freelargeimages.com/the-starry-night-2345/
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Mean DrugsDigoxin: yellow vision with halos
Van Gough
Anticholinergic: loss of accommodation, AAC
glaucoma
Bisphosphonates: uveitis
Rifabutin: uveitis
Sildenafil: blue vision, ischemic optic neuropathy
Sulfonamides: myopia
Topiramate: AAC glaucoma
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Interesting FactsResearchers have used Tetris, with
favorably results, to treat lazy eye
http://www.ctvnews.ca/health/tetris-
can-help-correct-lazy-eye-
researchers-1.1249179
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ConclusionLots of red herrings/similarities
Glaucoma: increased IOP, fixed w/ loss of
direct/consensual, failure of drainage, drop
pressure!!!!!
Hyphema: risk of rebleeding/glaucoma. Admit
sickle cell
Iritis: highest intensity surrounding limbus, miotic
pupil, pain with eye movements/photophobia, cell
and flare, other causes
Conjunctivitis has sparing
Hypopyon: post surgery, staph/strep, endocarditis
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Conjunctiviti
s
Iritis Keratitis Glaucoma
Vision Normal Blurred Blurred Very Blurred
Pain None Moderate Severe Severe
Photophobia None Moderate Moderate Moderate
Discharge Purulent/Serou
s
None None/Slight None
Injection Limbic Sparing Perilimbic Perilimbic Diffuse
Cornea Clear Clear Clear to Cloudy Cloudy
Pupil Normal Miotic Normal Mydriasis
IOP Normal Low to Normal Normal Very elevated
The Red Eye Discrepancies
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Citationshttp://www.tedmontgomery.com/the_eye/eyephotos/index.html
http://lifeinthefastlane.com/ophthalmology-befuddler-007-2/
http://emedicine.medscape.com/article/798811-treatment
http://lifeinthefastlane.com/ophthalmology-befuddler-030/
www.lifeinthefastlane.com/uveitis
http://www.emrap.tv/index.php?option=com_content&view=article&id=157:EMRAPTV57_iritis-testa
http://emedicine.medscape.com/article/798323-overview
http://emedicine.medscape.com/article/1201134-overview
http://emergencymedic.blogspot.co.nz/2011/06/hypopyon.html
https://www.vsp.com/eyes.html
http://www.unt.edu/rss/class/mike/5700/eyecoloralcohol.pdf
http://www.ctvnews.ca/health/tetris-can-help-correct-lazy-eye-researchers-1.1249179
http://www.factslides.com/s-Eyes
http://www.uptodate.com/contents/evaluation-of-the-red-eye
http://www.uptodate.com/contents/approach-to-the-adult-with-acute-persistent-visual-loss
http://www.uptodate.com/contents/bacterial-endophthalmitis