“By participating, you agree the episode may be published and distributed.” Trebs Thompson is a visual artist that is going blind. Trebs has a condition called Macular-Telangiectasia or MacTel, She has MacTel Type 2 which affects both eyes. Macular Telangiectasia is a rare progressive disease that causes blood vessels around the fovea to become abnormal which over time causes loss of detail and central vision loss over time. Even faced with visual disturbances, floaters, ocular mi...