Ten Characteristics of Cortical Visual Impairment By Kristy Josuweit TVI
Cortical Visual Impairment• Definition: Cortical Visual Impairment (CVI) is a breakdown in communication between the eyes and the brain.• Children & adults with CVI present with most or all of the following ten characteristics (Roman, 2007).Roman-Lantzy, C. (2007). Cortical visual impairment: an approach to assessment andintervention. New York, NY: AFB Press.
Color & Movement• Color:• Has a preferred color: Typically red or yellow• Only that preferred color is seen• Movement:• Object must move to be seen
Latency & Light Gazing• Latency:• When object is presented, visual attention is delayed• Light Gazing:• Child looks at light for extended period of time
Visual Complexity and Field Preferences• Three types of Visual Complexity:• surface of object: too many colors on one object• viewing array: too many objects in one space• Sensory environment: background noise is distracting• Field Preferences:• Child holds visual gaze in limited visual fields
Distance Viewing & Visual Reflexes• Distance Viewing:• Child sees best with objects close to face• Visual Reflexes: Child does not blink to touch and or to visual threat
Visual Novelty & Visual Motor• Visual Novelty:• Child only visually attends to familiar objects• Visual Motor:• Look and reach are separate events• No visually guided reach