Week 9 Lab

what are you testing for using a pen 6-12” from face, have pt follow pen w/ eyes ONLY. Move slowly in a “T”, “X”, & “O” to move thru all areas of visual field.

Document any area/ROM that pt is unable to move into.

Eye ROM (CN III, IV, VI)

what are you testing for using a Snellen chart; pt positioned 20 ft away; test 1 eye at a time; ask to start at top & move down→ lowest line read correctly is visual acuity (can wear glasses)

visual Acuity (CN II)

if move X down & inward, R eye unable to follow what muscle & nerve?

R trochlear (CN IV) superior oblique

what region of brain is CN IV

midbrain

what are you testing for using a pen, have pt track the pen side to side. Do not move to end ROM.

Document smoothness of mvmt & success in tracking

pursuits

what test of rapid localizations uses 2 targets, ask pt to shift gaze b/t targets on command.

Document any over/undershooting or inability to isolate eye mvmt from head mvmt.

horizontally & vertically

saccades

what are you testing for when start w/ a pen 12” from pts nose & ask them to follow tip as you bring pen toward their nose. Observe if both eyes are moving together & if both move (=) in toward nose.

Ask pt to report if/when pen becomes blurry or “double”.

Document distance at blurry/double point→ normal is 2-4”

Convergence

can get divergence going back out

What are you testing when pt sits in front of examiner & is asked to stare at their nose. Bring a colored object, finger, or pen into their visual field from periphery. Ask pt to report when they see object/finger.

Examiner’s vision is used at “norm”.

Complete in all 4 visual quadrants.

Visual Field Screening (confrontation testing)

can pt move head during visual scanning (eye spy) exam?

no

during convergence/divergence you can assess for

strabismus (esotropia (in) vs (out) exotropia)

if you have a visual field impairment what is it called?

hemominous hemianopsia

How does Somatoagnosia assessment differ from the assessment of right/left discrimination?

Do not use R or L terminology

Which system, if impaired, could impact a person’s performance on Somatoagnosia assessment (asking pt to imitate examiner)?

proprioception

What common functional task could be used to assess for Depth/Distance Perception & Figure-Ground Discrimination impairments?

stairs or sit pivots