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31 Cards in this Set
- Front
- Back
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Neuro vision
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addresses vision changes that are secondary to neurological injury. Can be addressed, treated and changed through neuroplasticity.
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Low vision
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organic changes in a person’s vision due to disease process. Therapy focuses on techniques and technology to compensate for the loss of vision
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Vision therapy was origionally developed by?
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1800s by French Ophthalmologist Javal.
Javal sought after noninvasive techniques to correct eye mal-alignment. |
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4 models of interlocking cirlces
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Where am I in space?
Where is it in space? What is it? Communicating above 3. All 4 of these interlocking creates vision. |
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how many areas of the brain are involved in visual processing
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35
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Info from our visual system is used for
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Decision making
Social interactions Motor control Postural control |
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Which lobe plays a large part in visual processing
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Parietal
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Magnocellular pathway
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Perceives and processes the ambient/peripheral visual stimuli
“Whole Picture” Provides general spatial orientation and information. Contributes to balance, movement and coordination and posture |
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what does "magno" mean
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Ambient vision
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What percentage of the magno splits before it reaches the LGN
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20% travels to the superior Colliculus
the rest goes to LGN in the thalamus and then to the visual cortex |
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The parvo and mango proccess in order to
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develop higher level visual processing/ perception to completely organize your environment
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Preparing a patient for vision involves looking at
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eye health
Lid closure to increase ocular health Begin patching (if needed) for diploplia |
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Why is LId closure important
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keeps eyes moist and helps prevent against ocular ulcers
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Heirarchy from Warren
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Adaption Through vision
Visucognition Visual Memory Pattern recognition SCanning Attention- alert and attending Oculomotor control/visual field/ visual deficits |
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Initially preparing a patient for vision rehab involves
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Initiate simple attention to task
Initiate simple visual scanning Simple spatial localization activities |
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What is a prism
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Transparent “wedge” that bends light.
Thickest part of prism is the base. Thinnest part of prism is the apex. apex. Prism will make an image appear to shift towards the direction of the apex. |
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the larger the diopter, the thicker the bases and the....
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more visual shift of objects in space
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Base Left
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Bases are the left in both eyes.
Shifts images to the right. Counter balance to the left. |
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What is the use of red/green filters
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Challenges Bioncularity and helps us understand if the brain is "turning off" and eye (supression)
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Waynes Saccadic Fixator
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Works Saccadic Skills
Pursuits and visual memory |
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Rotating Pegboard
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Ocular Motility
Pursuits Binocular Fusion Suppression Control Eye-Hand Coordination |
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Parvocelluar Pathways
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Ventral Stream
Most sensitive to fine detail central vision processing shapes, patterns, colors |
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Pathway of the parvocelluar
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Fibers start at retina travel to optic nerve, chiasm tract, synapse at LGN
Occipital lobe Then temporal lobe |
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Dorsal route goes through what lobes
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parietal and frontal
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Ventral route goes through what lobes
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temporal and frontal
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what lobe initiaites pursuits
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occipital
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what lobe initiates saccades
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frontal lobe
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visual spatial perception is controlled by what lobe
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temporal
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a prism that is base in relaxes______ by causing the eyes to _____
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relaxes convergence
Eyes will need to diverge to compensate |
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Base out would be prescribed for someone with
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Exotropia
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Opthamologist vs Optometrist
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Optha looks at disease pathology (may not address neuro)
Opto do more intervention/diagnosis- would be the people to prescribe prisms |
