Vision Neuro Anatomy

Question 1

What are the three3 fluid chambers of the eye

Answer 1

Anterior Chamber
Posterior Chamber
Vitreous Chamber

Question 2

What does aqueous humor do

Answer 2

Provides nutrients to the lens
moves from posterior to anterior through ciliary body

Question 3

Action of ciliary body

Answer 3

When looking further away they relax
when looking closer they contract to thicken the lens

Question 4

Role of the Retina

Answer 4

Has photoreceptos furthest away from the light
Rod- no color low light
cone- high light and color

Question 5

What 3 cranial nerves control eye movements

Answer 5

3-oculomotor
4- Trochlear
6- Abducens

Question 6

Role of CN 3

Answer 6

Does most of eye movements
move eye up, down and out
lifts eyelids

Question 7

Role of CN 4

Answer 7

Rotates eye, depresses the eye
Down and in

Question 8

Role of CN 6

Answer 8

Moves eye laterally

Question 9

What are the two streams of information form the visual cortex

Answer 9

ventral and dorsal

Question 10

What information does the dorsal stream take in

Answer 10

Spatial relations and general info

Question 11

What information does the ventral stream account for

Answer 11

Recognition and description
more specific

Question 12

What does visual integrity asssess

Answer 12

acuity
Refraction
Contrast sensitivity

Question 13

What does visual efficiency assess

Answer 13

oculomotor control
binocular vision

Question 14

What is anopia

Answer 14

lesion somewhere along the tract
individual is aware of anopia

Question 15

What happens to vision over 40 years

Answer 15

lens lose flexibility and isn’t able to adjust as things move closer
Need bifocals or reading glasses

Question 16

Intervention for contrast sensitivity

Answer 16

Compensations!!
Higher contrast, increased lighting, different colors, bolded letters, bright colors/tapes around environment

Question 17

What is Visual efficiency

Answer 17

how the eyes move together

Question 18

Ocular alignment or binocular vision disorders

Answer 18

inability to fuse image
incoordination of eye muscles

Question 19

Causes of Ocular alignment or binocular vision disorders

Answer 19

damage to CN or MLF in brain stem
Damage to CN 4
Weakness or asymmetry of strength of eye muscles

Question 20

Strabismus

Answer 20

ocular misalignment

Question 21

Classifications of Strabismus

Answer 21

Tropia=constant
Phoria= present sometimes or worsens with fatigue
Hyper=superior
Hypo=inferior
Exo=out
eso=in

Question 22

Amblyopia

Answer 22

Vision is less than 20/20 in one eye even though anatomy is normal
Brain is only using the strong eye
Patching is used to force brain to use the less used/weaker eye

Question 23

Convergence vs Divergence

Answer 23

Convergence= adjust gaze as a target come closer
Divergence= adjust vision as target moves away

Question 24

Ocular ROM

Answer 24

want to work on monocular first then binocular
supports pursuits

Question 25

Pursuits

Answer 25

Are eyes moving together
is there head eye dissociation

Question 26

Adaptive techniques for pursuits

Answer 26

Anchor at beginning of line
teach organized scanning
slower search

Question 27

Saccadic eye movement

Answer 27

looking from one thing to another
should be assessed in near and far vision
Horizontal,vertical and diagonal

Question 28

Diplopia

Answer 28

Double vision
can be horizontal or vertical
caused when there is misalignment

Question 29

Things to assess for diplopia

Answer 29

Degree- are the images overlapping or touching, or tw complete images
Distance- measure far away and near
Constant or intermittent
Midline or peripheral

Question 30

Interventions for Diplopia

Answer 30

Patching or occlusion