The EyePathologist is a web-based, instructional environment on the anatomy and pathology of the eye designed to emulate one-to-one interaction with an expert eye pathologist. It is designed for use by a wide range of health professionals from first-year medical students to ophthalmic pathologists as a teaching and reference tool. A database of more than 4,500 diseases that affect vision and the eye as well as other tissues, lavishly illustrated with over 4,000 high quality images, includes dynamic links to a glossary of over 6,000 linked definitions.