Cortical Visual Impairment Toy | LED Color Change Ball | Visual Impairment Toy | Vision Therapists LOVE This Toy Provides visual stimulation for children that are affected by Cortical Visual Impairment Battery-powered and portable so that it can travel with you and your child Has been evaluated by renowned expert on CVI, Dr. Christine Roman-Lantzy Provides proper stimulation and feedback to children with CVI Vision Therapists LOVE This Cortical Visual Impairment Toy