Jeremy Sivak, University Health Network (IMAGE) University Health Network Caption This is principal investigator Dr. Jeremy Sivak holds the Glaucoma Research Chair at the Donald K. Johnson Eye Institute at UHN. Credit UHN Usage Restrictions None License Licensed content 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.