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31 Cards in this Set
- Front
- Back
cocaine
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block ne reuptake --> dilate nl eye, no effect on horner's (50% 1/2nd order, assoc pancoast) since no ne release in first place
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paredrine
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oh-amphetamine, indirect adrenergic agonist --> inc ne release --> dilates nl or 1/2nd order horner's, no effect 3rd order horner's
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dilator mm
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a-adrenergic, outside part of iris
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pupillary sphincter mm
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cholinergic, inside dilator mm
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ciliary body mm
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cholinergic contraction (accommodation), b-adrenergic relaxation (far vision)
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horner's syndr
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dec sns stim, miosis (inh dilator mm), ptosis (inh sup tarsal aka muller's m), raised brow (skeletal m compensation), color change (dec melanocyte stim, chronic/congenital)
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ant chamber angle
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cornea-iris
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anisocoria
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nl 20% pop, horner's, adie's (tonic) pupil, cniii palsy, pharm (belladonna alkaloids from jimson weed similar to atropine, scopolamine), iris dmg
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adie's pupil
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benign, 70% young f teens-30s, 50-90% dec dtr, usu unilateral, very slight reactivity to light
dmg post ganglionic psns nn from ciliary ganglion --> denervation hs (takes time to develop) dx: .1% pilocarpine (too weak fo rnl pupil) --> contraction |
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pilocarpine
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psns agonist, 1% constrict nl pupil, .1% too weak except for adie's, spasm of accommodation, red intraocular p (stretch trabecular meshwork spaces by pulling iris in), won't constrict pharm dilated pupil, inc visual acuity (dec curvature of cornea)
ae: too much --> won't dilate at night, brow ache |
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cycloplegic agents
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cholinergic antagonist (mAchR), relaxes accommodation (ciliary body), relaxes pupillary constriction (sphincter)
atropine, tropicanimide, cyclopentolate, homatropine, scopolamine |
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atropine
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from bella donna, most potent, up to 2 wks
use sever inflamm (uveitis w/ sarcoidosis, iritis, post-op) |
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tropicanimide
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mydriacyl, shortest, onest 30 min, up to 4-6 hrs, standard, no diff .5/1% for fundus exam, determine refraction errors in children
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cyclopentolate
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cyclogyl, stronger, last 24 hrs, use corneal abrasion (ciliary spasm pain), other mild conditoins, 2ce/day
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homatropine
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longer than cyclopentolate, shorter than atropine, 1-3 days, 4x/day
use corneal abrasion, chemical burn, iritis, uveitis, post-op |
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scopolamine
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2-4 days to wk
ae psychosis, restlessness, confusion, hallucination, vomiting, urinary incontinence use motion sickness (transdermal, can cause unilateral pupil dilation) |
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phenylephrine
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2.5% neosynephrine, 5-6 hr, onset 45 min, stim dilator mm (sympathetic), muller's (eye open wide), vasoconstrictor, small conc otc for redness (rebound effect)
10% sol death in few drops due to htn crisis, occipital ha, ventricular arrhythmia, tachycardia |
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mydriatic agent
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dilate pupil (sns stim)
phenylephrine |
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routine dilation
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combo 1% tropicanimide + 2.5% neosynephrine
.5% or 1% tropicanimide alone REMEMBER TO DO FLASHLIGHT TEST TO CHECK FOR NARROW ANT CHAMBER ANGLES BEFORE DILATE PT'S EYES |
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dapripazole
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rev-eyes, a-adrenergic reversal
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nl fluid flow
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ciliary body prod --> post chamber --> pupil --> ant chamber --> trabecular meshwork --> schlemm's canal --> episcleral v --> aq v --> blood
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dx glaucoma
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nl 15-16 mmhg
goldman applantor on anesthesized eye (old schiotz tonometer w/ weight), optometrist use non-contact air puff check optic n cup/disc ratio, humphrey visual field perimeter |
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narrow angle glaucoma
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<5% glaucoma pts, lens swells, cataracts --> push iris fwd, if dilate --> iris bunches up --> sudden absolute closure trabecular meshwork --> sudden onset inc p --> severe pain (eyes --> ha), redness of sclera, blurred vision, halos around lights, n/v, cloudy cornea, fixed/irregular/mid-dilated pupils
tx: break attack w/ drops to dec p, surgical periph iridectomy (now w/ lasers) --> equalize p ant/post chambers, lifetime cure, bilateral |
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epi
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direct ns a/b-agonist, conjunctival constriction, slight mydriasis, red intraocular pressure (inc outflow), vasoconstriction
ae: if abs nasal vv --> htn crisis, tachycardia, ha, palpitation, chronic red eye, pvc, local burn/irritate, local allergic rxn, accumulate melanin granules |
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dipivefrin
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propine, lipophilic ver of epi so better abs cornea --> convert to epi inside (much better ae) so .1% = 2% epi
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brimonidine
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alphagan, s a2-adrenergic, avoid b ae
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timolol
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b-block, drug of choice glaucoma, target ciliary body (dec prod)
ae: lethargy, lightheadedness, fatigue, mem loss, bradycardia, syncope, hypotension, arrythmia, wheezing, pulm edema, chf, red libido, depression, death expensive |
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levobunolol
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betagan, ns b-block
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betaxolol
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betopic, b1-block (cardioselective), not as effect but limit ae (esp pulm), use hx chf, asthma
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combigan
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alphagan + timolol, inc compliance
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pg analogue
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1st line drug, no systemic ae, iris/skin can get darker, eyelashes longer (latisse)
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