Discover our complete suite of visual function test systems


Celeris, our flagship preclinical system, revolutionizes rodent testing with dual function stimulator-electrodes. We also offer ERG solutions for other small to large animals. 


We offer four broad categories of visual function tests—electrophysiology, psychophysical, objective acuity, and pupillometry, providing a complete picture of a person’s visual function.

Trial Services

Our services include study setup assistance, training, and data review. These services enable sites to gather consistent, quality data across multiple locations worldwide.

Supporting researchers and clinicians worldwide for more than forty years

Three reasons to partner with the premier manufacturer of visual 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.

Stay up to date with our latest news

  • New Visual Diagnostic Systems Combine Benefits of Visual Electrophysiology and Perimetry

    ISCEV and IPS jointly published the FST guideline The International Society for Clinical Electrophysiology (ISCEV, and the Imaging and Perimetry Society (IPS, jointly published in January 2024 a guideline for the full-field stimulus test (FST), also known as the full-field stimulus threshold test. FST combines features from visual electrophysiology and perimetry, a development…

  • Collecting Visual Electrophysiology Normative Data in West Africa

    We are pleased to announce the installation of our visual electrophysiology system at the Diagnostic Visual Function Research Laboratory of the Department of Optometry and Vision Science, University of Cape Coast, Ghana. This hospital, situated in the central region of the country on the seafront overlooking the Atlantic Ocean, now hosts the first Diagnosys system…

  • Retinal Gene Therapy Once Again Utilizes FST Testing

    DiagnosysFST continues to be an important diagnostic tool to quantitatively evaluate the efficacy of breakthrough gene therapies for inherited retinal degeneration. We recently witnessed a new breakthrough in gene editing. This time it’s for CEP290-associated inherited retinal degeneration (IRD), thanks to the BRILLANCE study sponsored by Editas Medicine. In a recent paper published in the…

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