Interventions
Phase I: Building visual behaviors (Ranges 0 to 3)
Working on:
- Consistent looking at a small set of objects
- Examples may be: pinwheel, familiar character (ex. Elmo), windsock, slinky, single colored spoon, etc.
- Items can be used as part of a daily activity (ex. show the red spoon before using it to eat)
- Can teach phonemic awareness and alphabet with auditory scanning- student will not be able to see or understand the visual letter, can use objects as anchors (ex. A for apple)
Guidelines for presenting items:
- Use objects of a single, preferred color
- Use objects that are shiny or reflective
- Use a simple background (black or white)
- Use objects that are familiar
- Use of movement to gain and sustain attention
- Presented in strongest field (usually peripheral)
- Present objects on a light box or use a flashlight to cast light onto the item (make sure the flashlight is held from behind the child)
- May be able to regard simple moving images on an iPad
- Decreased background noise
- Seated away from light sources
- Materials present within 18 inches or less
- Provide ample wait time, provide verbal prompt prior to presentation and then silently wait for visual attention, sometimes up to 30 seconds
Next steps...
- Teach salient features of familiar objects (ex. what makes a spoon a spoon-see salient features books under the Adapted Books tab)
- Add more objects
- Add objects of another color
- Try increasing the complexity of objects (ex. 2 colored objects)
- Show similar objects to familiar objects (ex. other types of spoons) and talk about what makes them similar and different
- Have students identify or select a requested object out of the group of preferred objects “Which one is your spoon?”
- Work on discrimination activities “Show me an object (spoon) like the one I am holding.”
- Work on recognition activities “Look at these objects and find the spoon”
- Work on identification activities (pairing with auditory scanning if needed) “What is this called?”
- With this specific instruction and practice, an individual with CVI will eventually learn to generalize visual information
Phase II: Integrating vision with function (Ranges 3+ to 7)
Working On:
- Starting to introduce 2-d materials using photos of familiar favorite objects
- Continue to teach salient features, now with photos of familiar objects
- Work on discrimination activities with photos “Show me an object (spoon) like the one I am holding.”
- Work on recognition activities with photos “Look at these objects and find the spoon”
- Work on identification activities with photos (pairing with auditory scanning if needed) “What is this called?”
- Continue teaching phonemic awareness and alphabet with auditory scanning- student will not be able to see or understand the visual letter until later in Phase II, can use objects and now photos as anchors (A for apple)
- Note: Visual attention does not guarantee understanding
Guidelines for presenting items:
- Use objects of a gradually increasing complexity
- May still need preferred color as part of the object
- May be able to use more complex backgrounds with familiar objects
- Use a simple background (black or white) with new items/photos
- Use of their favorite color for highlighting of salient features and word bubbling
- Movement may still be needed to gain attention
- Presented in strongest field, may be able to present more centrally
- It may still be difficult to see items exactly at mid-line, off set slightly to one side
- Present new objects on a light box or use a flashlight to cast light onto the item (make sure the flashlight is held from behind the child)
- Use of a iPad or light box to present 2-d images
- May still need slightly decreased background noise
- Seated away from light sources
- May be able to regard movement from further away
- Wait time may still be needed when individual is ill, tired, or stressed
Phase III: Refinement of remaining characteristics (Ranges 7+ to 10)
Working On:
- Continued refinement of CVI characteristics
- It is very unlikely to reach a score of 9-10, **some characteristics may remain life-long
- Provide instruction in phonemic awareness of letters and sounds, now with letters using bubbling around the letters, can use objects and photos as anchors (A for apple)
- Photos are still the easiest to perceive, but can start to introduce images like those used in a AAC device **images will need to be taught for understanding
- Teach salient features of letters, numbers, picture symbols, and/or whole words, with preferred color highlighting
- Work on discrimination activities with letters, numbers, picture symbols, whole words “Show me one like ___”
- Work on recognition activities with letters, numbers, pictures symbols, whole words “Show me the ___”
- Work on identification activities with letters, numbers, pictures symbols, whole words (pairing with auditory scanning if needed) “What is this called?”
- Matching printed word, number, or letter to the empty color outline shape of the word, number, or letter
Guidelines for presenting items:
- Use objects of a gradually increasing complexity
- May be able to use more complex backgrounds with less complex objects
- Use a simple background (black or white) with new items/images
- Use of their favorite color for highlighting of salient features and word bubbling for new words
- Movement may occasionally be needed to gain attention
- It may still be difficult to see items exactly at mid-line, off set slightly to one side
- Use of a iPad or light box may still help support attention
- May still need slightly decreased background noise, especially for complex or difficult activities
- Seated away from light sources
- Wait time may still be needed when individual is ill, tired, or stressed
- May be able to regard a non-moving target up to 10 feet and moving targets up to 20 feet