Diagnosys LLC

Diagnosys is an inventor-owned private company devoted to the field of ophthalmic electrophysiology. Founded in 1983 as Doran Instruments, this company invented the Maculoscope, a focal ERG system that is the predicate device for most of the commercial ophthalmic testing equipment available today. As the needs of the industry evolved, the Maculoscope also evolved into the current Espion Ophthalmic Electrophysiology family of devices. Hundreds of peer-reviewed research papers have been published using our systems. With offices in the United States, Great Britain, and Ireland along with our distributors across the globe, we can meet the needs of our continually expanding worldwide customer network.