Visual Perception Testing Ann Bonvallet, Irlen Syndrome Diagnostician Ann Arbor, MI 48103 Phone: 734-663-5590 While teaching learning disabled students in Ann Arbor Ann saw CBS’s report on Irlen tinted filters and their benefit for LD readers. This innovative treatment, which corrects visual distortions, was developed in 1983 by Helen Irlen, an educational psychologist in Long [...]