Session 17 - Vision Rehabilitation Approach Flashcards
- sensory or initial vision reception (visual fields, acuity, peripheral vision)
- must have light for functions of visual acuity and contrast
CN 2 (optic)
name the 2 functions of CN 2.
- acuity
- peripheral vision
ocu
oculomotor functions (ROM, saccades)
CN 3,4,6
- light reflex, visual reflex pathway: reflex from both direct response or consensual response to light for constriction of pupil
- mediates pupillary light reflex and accommodation
CN 3
name the 3 functions of CN 3
- pupillary constriction
- pupillary consensuality (light reflex)
- convergence
name the 3 functions of CN 3,4,6.
-fixation
-visual scanning or tracking
-saccades
(eye ROM, vestibulocular reflex)
CN 2 lesion - optic nerve on one side - what is the resultant field deficit of being blind in right eye?
lose right nasal and right temporal
CN 2 lesion - optic nerve on one side - what is the resultant field deficit of being blind in left eye?
left nasal and left temporal
nasal fibers of optic chiasm are affected
bitemporal hemianopsia
which fibers are affected in bitemporal hemianopsia?
left nasal and right nasal
CN 2 lesion - optic nerve on one side - what is the resultant field deficit of being blind in right eye?
one side of optic tract deficit - what are the deficits of this occurring on right side of optic tract?
left homonymous hemianopsia AKA contralateral HH
one side of optic tract deficit - what are the deficits of this occurring on left side of optic tract?
right homonymous hemianopsia AKA contralateral
what are the resultant deficits of left ipsilateral nasal hemianopsia?
lose left temporal
