Unlike other vision impairments, CVI stems from an injury to the visual centers of the brain that affects how it communicates with the eyes. People with CVI usually have healthy eyes but have trouble processing and interpreting what the eye sees. Certain characteristics of CVI influence the design of materials very differently from materials designed for people with vision loss or blindness, with an emphasis on maximizing the effectiveness of visual cues to help the brain interpret what it is seeing. The characteristics of CVI can be reduced over time with enough support, training, and practice.
Characteristics of CVI and improving visual perception:
- Use strong or bright colors - an object consisting of one single color is easier to process than a multicolored image.
- Movement and light help focus and identify objects
- Remove visual clutter by simplifying images to one shape and removing complex backgrounds or placing images on a solid black or white background.
- Familiar objects are easier to recognize and understand than trying to process continually new images
Resources to learn more about CVI:
Little Bear Sees - provides an overview of CVI plus tips and ideas for caregivers and teachers
Children with CVI - presentation given by TVI's at Douglas County School District, Colorado