Pupil Evaluations Flashcards
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Pupils are measured on a scale from ____ with good constriction recorded as ___ and no pupillary reaction recorded as ____
Corectopia
A misplaced pupil
Anisocoria
Unequal pupil size
Miotic
Small, constricted pupil
Mydriatic
Drug classification that dilates to pupil
Direct light reflex
Constriction of the pupil to light as observed in the illuminated eye
Consensual light reflex
The constriction of the pupil to light as observed in the fellow eye
Sphincter muscle
One of the iris muscles responsible for constriction - parasympathetic
Dilator muscle
One of the iris muscles responsible for dilation- sympathetic
Accommodative/near reflex
The constriction of the pupil in response to accommodation of a near stimulus
Marcus Gunn reflex
Paradoxical dilation to a bright light, a sign of optic nerve disease (aka APD)
Optic nerve —> optic tract —> pretectal nucleus (midbrain) —> decussate —> Edinburgh Westphal nucleus —> cranial nerve 3 —> ciliary ganglion —>inferior CN 3 —> sphincter
What is the pupillary pathway?
Dilator muscle/sympathetic innervation
Increased anisocoria in dim light means one pupil cannot dilate hinting at a problem with ____
Sphincter muscle/parasympathetic
Increased anisocoria in bright light means one pupil cannot constrict, hinting at a problem with…
Near light dissociation
Pupil constricts at near but not to direct light (neurological— syphilis)