Retinal Ganglions (IMAGE) Duke University Caption This image from a confocal microscope shows four retinal ganglion cells, the cells that send a signal from the retina to the brain. Credit Marija Rudzite, Duke University 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.