Optic Nerve Swelling in IIH (image) NIH/National Eye Institute Caption On the left is a normal optic nerve (light circle at center) and on the right is the optic nerve swelling seen in IIH. Credit Dr. Michael Wall, University of Iowa. Usage Restrictions Please credit Dr. Michael Wall, University of Iowa. 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.