Schematic illustration (IMAGE) National Research Council of Science & Technology Caption (A) Schematic illustration of retinal prosthesis showing perception of the word 'KIST'. Electric stimulation elicits spike trains in retinal ganglion cells (RGCs) for artificial visual percept. (B) Conceptual spike trains that may arise in the healthy retina. High trial-to-trial consistencies are required for consistent visual percepts across repeats of stimulation. (C) If RGCs in the degenerate retina produces highly variable spiking activities across repeats, artificial visual percept would be inconsistent, confounding the brain. Credit Korea Institute of Science and Technology (KIST) Usage Restrictions The sources of photos and research results from KIST must be specified. 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.