Term
| What is the innervation to the internal muscles of the eye? |
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Definition
Dilator: Alpha Adrenergic
Sphincter: Cholinergic
Cilliary: Contraction(Fatten Lens)-Cholinergic
Relaxation(Streches lens)-Beta Adrenergic |
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Term
| How do you diagnosis and evalate the problem in a horners patient? |
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Definition
Dx: 10% Cocaine Solution or Light reflex
Light-Horner's pts show larger difference between pupil sizes during the light reflex
Eval: 1% Hydroxyamphetamine inducing dialation indicates a Primary or Secondary horner's nerve lesion |
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Term
| What is Adie's Pupil and how do you diagnose it? |
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Definition
Def: Post-ganglionic Parasympathetic blockage to the eye
Dx: 1/8% Pilocarpine will constrict because of parasympathetic denervation, Non-adie's will not constrict bc solution is too dilute |
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Term
| What is the use and duration of action of the common pupilary dialators? |
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Definition
Tropicamide: 4-6hrs, Eye exam
Phenylephrine: 6hrs, Combo for Eye exam
Cyclopentolate: 12-24hrs, Corneal Abrasions
Homatropine: 1-2days, Corneal Irritations
Scopolamine: 2-4 days, Motion Sickness
Atropine: 1-2wks, Organophosphate Poisoning, Serious Eye Injury |
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Term
| Which pupilary dialators have bad side effects? |
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Definition
Scopolamine: Psychosis, Restless, Confusion, Hallucinations, Vomiting and Incontinence
10% Phenylephrine: HPTN Crisis, Occipital Headache, Ventricular Arrhythmias, Tach
2.5% Phenylephrine: Rebound Redness |
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Term
| What is the mechanism of action of the Glaucoma Drugs |
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Definition
Pilocarpine: Stretch Trabecular Mesh
Epinephrine: Increase Outflow
Dipivefrin: Lipophillic Epi
B-Blockers: Decrease Aqueous Formation |
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