A Complete Suite of Visual Functions Tests

The Premier Manufacturer of Electrophysiology Systems


We design all our hardware and software in-house to our and our customers’ exact specifications.



Our patented and trademarked platforms span the range from preclinical to clinical use, providing researchers and clinicians with products that have the broadest use and capability in the market.



Our longstanding relationships within the electrophysiology community allow us to cross the bridge from academic labs into patient clinics, enabling easier collaboration between institutions.


Supporting Researchers and Clinicians Worldwide

Our Events

02 March 2024
2024-03-02 - 2024-03-07 Honolulu, HI

NANOS 2024

North American Neuro-Ophthalmology Society

07 Apr 2024
2024-04-07 - 2024-04-11 Austin, TX

AAPOS 2024

American Association for Pediatric Ophthalmology and Strabismus

05 May 2024
2024-05-05 - 2024-05-08 Seattle, WA

ARVO 2024

The Association for Research in Vision and Ophthalmology

Our News

The Full-field Sensitivity Threshold (FST) for Ophthalmic Diagnosis

What is the FST? The FST is a psychophysical test with distinct advantages over other tests for quantifying vision in...Read More

Software Version V6.66 Release

Software Version V6.66 released on June 1, 2023   New Features and Bug Fixes: ColorFlash  Fixed a bug introduced by...Read More

EER Patent

EER Patent Diagnosys is proud to announce that the USPTO has patented another one of our inventions! Our Electrically Evoked...Read More