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Vision After Epilepsy Surgery

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FIELD OF VISION

What you see when your eyes are fixed in one position looking at one thing

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Your field (island) of vision

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CENTRAL VISION

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FOVEAL/CENTRAL V. PERIPHERAL VISION

ONLY YOUR CENTRAL VISION IS IN FOCUS

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WHAT YOU SEE IN YOUR VISION FIELD

PERIPHERAL VISION CAN’T SEE DETAIL

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NORMAL VISUAL FIELD

EACH EYE IS DIFFERENT

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TWO EYES OVERLAP

TO FORM YOUR VISUAL FIELD

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RIGHT HOMONYMOUS HEMIANOPIA

PERMANENT AND IRREVERSIBLE CORTICAL VISION IMPAIRMENT

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Visual field - right homonymous hemianopia

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The visual field loss moves with the eyeballs!

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GROUP EXERCISE #2

SEE FOR YOURSELF

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On the next slide, focus ONLY on the GREEN word.

Now, read the entire paragraph while focusing only on the GREEN word.

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October arrived, spreading a damp chill over the grounds and into the castle. Madam Pomfrey, the nurse, was kept busy by a sudden spate of colds among the staff and students. Her Pepperup potion worked instantly, though it left the drinker smoking at the ears for several hours afterward. Ginny Weasley, who had been looking pale, was bullied into taking some by Percy. The steam pouring from under her vivid hair gave the impression that her whole head was on fire. Even aside from the rain and wind it hadn't been a happy practice session. Fred and George, who had been spying on the Slytherin team, had seen for themselves the ...

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“Reading into nothingness”

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ORIENTATION AND MOBILITY

CHALLENGES

“Invisible disability”

bump into people = misunderstandings

bump into objects = harm

trip and fall/stairs

pouring beverages

reduced participation in social life, sports, recess

50% states prohibit driving

visual neglect

INTERVENTIONS/TRAINING

Comprehensive evaluation (static/dynamic/familiar/unfamiliar)

spontaneous saccades to the blind side

mark crucial features

consistent furniture placement

white can to cue others?

Hemianopsia.net, Perkins

MULTIPLE CHALLENGES AND INTERVENTIONS

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How does the child accommodate?

head tilt
face turn and eye gaze into hemifield (...is it autism?)
exotropia/lazy eye (what about binocular vision?)

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alpine

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last letter cancellation therapy

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ECCENTRIC VIEWING

looks slightly away from the word or object in order to view it peripherally with the remaining area of the visual field

Run

SIDE VIEWING

The Low Vision Handbook for Eye Care Professionals 2007

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SMALLER TEXT

THE MORE LETTERS THAT CAN BE REVEALED, THE BETTER

RAB

RABBIT

(Schuett 2007)

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vertical

presentation

of

text

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'my tricks are not bad,' said the cat in the hat. 'why, we can have lots of good fun, if you wish, with a game that i call up-up-up with a fish!' 'put me down!' said the fish. 'this is no fun at all!

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HEMIANOPIC DYSLEXIA

VISUAL-ATTENTIONAL-OCULOMOTOR DISORDER

COMPROMISED VISUAL EXPLORATION

Finding photos, chapter titles, footnotes.

READING IS TOO DIFFICULT

May give up reading for pleasure.

CAN IMPROVE WITH INTERVENTION

Immediately correcting maladaptations like guessing; supervised reading; saccadic training

POOR WORD IDENTIFICATION

Difficulty landing eyes on a word (planning and guiding eye movements)

REDUCED READING SPEED

Reading every word (increased fixation; longer fixation on a word; fixation repetition

READING ERRORS

Omission of prefixes and small words

(Schuett 2008)

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www.brainrecoveryproject.org

CONTACTUS

TELEPHONE

(833) 675-3335

ADDRESS

969 Colorado Blvd., Suite 101

Los Angeles, CA 90041

United States

E-MAIL

info@brainrecoveryproject.org

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