Similarities between Two Blinding Diseases (image) University of Pennsylvania Share Print E-Mail Caption A heat map showing patterns of gene expression reveals similarities between two different forms of retinitis pigmentosa, a blinding disease. The commonalities involve innate immune pathways, and point to new strategies for treatment. Credit University of Pennsylvania Usage Restrictions In context of reporting Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.