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Tittle: CVI characteristics Across the Phases

All infromation retrieved from Dr. Christine Roman-Lantzys book.

Any references to the characteristics and phases of CVI ,st be credoted tp Dr. Roman-Lantzy.

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Field preferences

Field preferences

Phase-1 Dorsal

Reacts to items presented within one periphery field. No use of central vi

Phase-II Dorsal-ventral

Phase-II Dorsal-ventral

Peripheral fields preference with emerging use of central vision

Phase-III

Ventral - visual fixations in three visual field positions. (left, central, right

Phase III Ventral

Visual Fixations in three visual field positions (left, central, right)

Complexity of sensory environment

Use subtopics to make your point

Complexity of sensory environment

Phase-I

Phase-I

Uses vison in uncluttered, quiet places only

Phase-II

Phase-II

Will tolerate low levels of familiar noises when looking, low visual complexity (black background)

Phase-III

Can tolerate most levels of sensory input while maintaining gaze. Noise levels may still make viewing difficult and overwhelm students

Phase-I

Colour Prererence

Colour Preferences

Phase-I

Child has a fovorite color and onlh looks at simple one colored items

Phase-I

Phase-II

Students starts to look at objects that are 2-3 cp;prs bit favorite color is included

Phase-II

Students starts to look at objects that are 2-3 cp;prs bit favorite col...

Phase-III

Students looks all items regardless of color. preferered color may be used to highlight.

Phase-III

Students looks all items regardless of color. preferered color may ...

Novulty

Novelty

Present visual materials

Text

Videos

Images

Symbols

Phase-1

Child only looks at familiar and favorite items

Phase-1

Child only looks at familiar and favorite items

Phase-II

May begin to look at photographs of familiar items. Begins to look ...

Phase-II

May begin to look at photographs of familiar items. Begins to look at novel items if they share similar characteristics with familiar items.

Phase-III

Student looks at familiar and unfamiliar objec...

Phase-III

Student looks at familiar and unfamiliar objects and pictures . Requires asistant for highly novel materials.

Movement

Phase-1

Movements is always necessary to elicit looking in t...

Phase-1

Movements is always necessary to elicit looking in the peripheral fields, slow shaking within two feet, in quiet environment.

Phase-II

Movements draws visual attention but is not always needed ...

Phase-II

Movements draws visual attention but is not always needed to sustain. May be distracted by movement at near .

Phase-III

Movement not neessary for near viewing. Can look beyond 10 feet for moving objects.

Phase-III

Movement not neessary for near viewing. Can look beyond 10 feet f...

Complexity of object

Complexity of objects

Q3

Q2

Q4

Q1

Phase-I

Student looks at single colored object against plain background. Will not look at toy with sound

Phase-I

Student looks at single colored object against plain background. Wi...

Phase-II

Student looks at 2-3 colored object with some sound. Student may look and then work away.

Phase-II

Student looks at 2-3 colored object with some sound. Stude...

Phase-III

Will look at multicolored itgem that produces sound.

Phase-III

Will look at multicolored itgem that produces sound.

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Complexity of Array

Complexity of Array

Phase-I

Views simple, one colored objects

Phase-I

Views simple, one colored objects

Phase-i

Views simple, one colored objects

Phase-i

Views simple, one colored objects

Phase-II

Views objects with 2-3 colors presentaed on simple background

Phase-II

Views objects with 2-3 colors presentaed on simple background

Phase-III

Can indetify familiar objects withing higher level of array.

Phase-III

Can indetify familiar objects withing higher level of array.

Complexity of faces

Phase I

Does not look at faces of familiar or unfamiliar persons

Phase I

Does not look at faces of familiar or unfamiliar persons

Phase-II

Will glance toward familliar faces when voice do...

Phase-II

Will glance toward familliar faces when voice does not compete. Student appears to look through you.

Phase III

Looks at an recognizes highly familiar people. Looks at self in mirror

Phase III

Looks at an recognizes highly familiar peop...

Distance viewing

Phase-I visual attention in near space only within 2 feet.

Phase-I visual attention in near space only within 2 feet.

Phase II

Will look at large stationary objects and moving targets up to 4-5 feet.

Phase II

Will look at large stationary objects and moving targets up to 4...

Phase III

Student looks behond 10-20 feet for moving items.

Phase III

Student looks behond 10-20 feet for moving items.

Light gazing

Light gazing

Phase I

Student is consistently visually distracted by primary sources of light. Toys with lighted properties can draw visual attention. Lights off. Curtains closed.

Phase-II

Student is attracted to an distrated by ight but can redirected. Backlighting can start to support viewing. Dimmed lighting. Face away from windows.

Phase-III

Attention to light may only occur when over stimulated. Backlighting can support viewing. Normal lighting fine. Face away from windows

Visually guided reach

Phase-i

Look and reach always completed as separate actions, look look aw...

Phase-i

Look and reach always completed as separate actions, look look away reach

Phase-II

Look and reach may occasionally occur with CVI accommodations (black background, no noise, use of light and movement)

Look and reach occurs. Look and reach occurs. Look look away reach may occur with highly novel or complex. materials

Latency

Latency

Phase I

Prolonged periods of latency each time and objects is presented.

Phase I

Prolonged periods of latency each time and objects is presented.

Phase-II

Latency is frequent but decreased slightly during periods ...

Phase-II

Latency is frequent but decreased slightly during periods of viewing.

Latency occurs half the time, may be a sign of fatigue or over stimulation

Phase-III

Latency occurs primarily when the individuals is hung...

Phase-III

Latency occurs primarily when the individuals is hungry, tired, or over stimulated.

Latency affected by high complexity and novelty

No blink to touch hat the bridge of nose or visual threat

No blink to touch hat the bridge of nose or visual threat

Intermittent or latent blink at touch, No blink to threat

Bliink to touch consistent. No blink to threat.

Intermittent or latent blink at touch, No blink to threat

Bliink to tou...

Blink to touch consistently present.

Intermittent, latent, or normal blink to threat.

Blink to touch consistently present.

Intermittent, latent, or normal blink to threat.

Class Note:

Dorsal-pheriferel - where things are.

Ventral- what we are seeing based on memory

Dorsal must be central vision- it is basic

Class Note:

Dorsal-pheriferel - where things are.

Ventral- what we a...

CVI-back side of the brain, occular means-impact visual field preference

CVI-back side of the brain, occular means-impact visual field preference

color thing must see by the side. left and right, time maintaind, weak eyes takes more time. New object show in better than good eye.

color thing must see by the side. left and right, time maintaind, weak eyes takes more ti...

When we understand which color childs like. We must using red color, holding object - using red cloth under the yellow dack or things.

When we understand which color childs like. We must using red color, holding object - usi...

Child only look of familiar and favourate items, ma;y begain at look at phto ipact familear item. students look at familiar and unfamiliar object, novelty means is new things. movement is primary defense, shing, morrored object, need for movement decrease as vision impairmetns , complexity- only one , only two color, only three color, black and black background always good, black tray, black board, right side a put picteure, left side free in the book or khata. Wear

Child only look of familiar and favourate items, ma;y begain at look at phto ipa...

teacher must wear black dress, destractive dress no good, use hand globs in black color, , card, board, item all are black

teacher must wear black dress, destractive dress no good, use hand globs in black col...

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