Pupil Flashcards
1
Q
what is miosis
A
iris sphincter contracts the pupil via CN3
2
Q
what is mydriasis
A
iris dilator muscle dilates via symp
3
Q
what is aniscoria
A
unequal pupil sizes
4
Q
what is physiological anisocria
A
less than 1mm (25%) of pop
5
Q
what is pathologic aniscoria
A
> 1mm
6
Q
what is a mydriatic disorder
A
abnormal pupil unable to constrict
7
Q
causes of mydriatic disorder
A
CN3 palsy, acute angle glaucoma, adie’s pupil, trauma
8
Q
what causes miotic disorder
A
horners, iritis, cholinergic drugs
9
Q
what is pathway of pupillary reaction to light
A
- light stims retina>pretectal nucleus>BOTH erdinger westphals> ciliary ganglion>iris sphincter contraction
10
Q
what is relative afferent pupillary defect (RAPD)
A
get a paradoxical dilation of the affected eye when the flashlight is shone in during the swinging flashlight test
11
Q
2 causes of RAPD
A
- optic nerve disease
2. retinal disease
12
Q
6 things that do NOT cause RAPD
A
- cataract
- corneal scar
- refractive error
- cortical blindness
- vitreous hemmorage
- functional visual loss
