Eye exam 2 Flashcards
Snellen chart
14” from face
Snellen chart: ask pt
read smallest line from left to right
Snellen chart: 3 or more mistakes
ask pt to read next line higher
Snellen chart: go to next eye
when pt reads line correctly with equal to or less than 2 mistakes
smallest line pt can read without making more than 2 mistakes is pt’s
visual acuity
normal visual acuity
20/20
abnormal visual acuity
anything other than 20/20 vision in either eye
refer to optometrist
Shadow test
stand in front of pt, look straight ahead, hold penlight close to side
start
posterior to level of pt iris slowly brought forward to line up with iris
held 180
assessed both eyes
normal shadow test findings
light on both sides of iris
open angle glaucoma findings
even if both sides of iris lights up
closed angle glaucoma findings
shadow on medial aspect of iris
emergency referral if what during shadow test
+ shadow with other signs/symptoms of closed angle glaucoma
Direct and consensual light reflexes pt holds
hands between eyes to block light
shine light into on pupil
look for direct response
cn2 is what
sensory to receive the light
cn3 is what
motor to constrict the pupil
normal light response
pupils constrict symmetrically on both and consensual
abnormal cn2 lesion
does not constrict on both direct and consensual
where is cn2 lesion seen
on direct eye
abnormal c3 lesion
lack of constriction on direct OR consensual
which eye is cn3 lesion
side of no constriction
cover/uncover
stare at spot of wall looking at conjugate of eyes
both eyes open
observe for what in cover/uncover
eye movement
normal cover/uncover
both eyes maintained conjugate gaze while one eye covered
abnormal cover/uncover
covered eye moves then corrects when uncover
what is the abnormal cover/uncover called when it corrects itself
non-paralytic strabismus
paralytic strabismus
eyes unable to attain conjugate gaze
