Look at this series of pictures. (From American Printing House for the Blind website)
How can very young children with intact visual skills understand that these are all ducks?
They understand “Duckness”.
They have a keen understanding of the salient features (Roman-Lantzy literacy) that make up this “Duckness” because of shared visual experiences with others and with access to pictures, TV and movies that feature ducks. This develops effortlessly for children with intact visual skills. Without direct instruction, they understand that real ducks are different sizes, colors, and ages. They understand that ducks can be seen in different perspectives depending on where and how they are standing. They understand that ducks can be flat in pictures. They understand that ducks can be symbolic in toys, signs, pictures, colored cartoons and in black and white drawings.
Our children with CVI lack this visual access to “duckness”. They lack the expanded and repeated knowledge about ducks. If they have seen a duck, their idea of “duckness” is limited to that one duck. Due to reduced eye contact with people and with reduced eye to object abilities, adults do not explain the shared salient features that all ducks share.
As adults serving children with CVI, we should be aware of this limited access and limited understanding that can occur in 3D and 2D. We must create opportunities to expand children’s access matched to their assessed functional visual skills measured with the CVI Range (Roman-Lantzy 2007). We must evaluate all our materials with this visual access limitation considered. We must adjust our own interactions and instructions to include salient feature, comparative language (Roman-Lantzy).