The first term used to identify Visual Stress was Irlen Syndrome, after Helen Irlen, one of the first to discover it. Eventually, Olive Meares, and even earlier discoverer, was given credit and the name Meares-Irlen Syndrome was given. Now, scientists and researchers primarily refer to it as Visual Stress, or more specifically to show distinction from visual stress from ocular motor problems, Pattern-related Visual Stress of PRVS is used.