Cortical Vision Impairment - CVI

Our speech therapist suggested that Macayla could be possibly suffering from Cortical Vision Impairment. We cannot actually diagnose this in Macayla due to her inability to communicate, but it certainly makes sense. CVI is caused by damage to the visual pathways in the brain and not to the eye itself. Macayla's occipital lobe and pathways are significantly deteriorated while her eyes are fairly healthy looking. Macayla seems to pick up on moving objects better than stationary and she tends to gaze at light sources. She responds to certain colors better than others such as yellow and green. From what I understand, green may be an unusual color to respond to in CVI but it may be due to the fact that she was not born with CVI but developed it after she knew colors. Typically, CVI sufferers respond to black, yellow and red. Our therapist suggested that we put simple objects on a black field so that it stands out better. Macayla responds to it and tends to focus better. I also noticed that she zeros in on white letters on a black screen such as the "This movie has been formatted to fit your screen" message at the beginning of some movies. She's not reading of course, but the pattern catches her eye. I wish we had known more about this sooner so that we could have looked for indicators and stimulated Macayla's vision more effectively.