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Vision Testing, Simplified.


  • clinical conditions

    Clinical Conditions

    We provide resources to assist you in diagnostics, monitoring disease progression, and quantifying improvement after ophthalmic treatment for a vast array of conditions.

    Click here to learn more about the variety of clinical conditions which affect your patients and how we can help.

  • clinical tests

    Clinical Tests

    Our electrophysiology testsā€”full-field (ffERG), multifocal (mfERG), pattern (PERG), visual evoked potential (VEP) and many moreā€”are compliant with ISCEV standards. DA, FST, and pupillometry round out our extensive collection of tests.

    Click here to explore the comprehensive selection of test options available for your patients.

  • clinical products

    Clinical Products

    Diagnosys provides fully modular equipment that performs in any workspace from ophthalmic lanes to diagnostic or operating rooms. Our platforms, stimulators, and add-ons modules accommodate the entire suite of visual function tests.

    Click here for detailed specifications of our internationally renowned products.


  • research applications

    Preclinical Applications

    Our tools quantify visual function in a wide range of subjects. Applications span drug discovery, preclinical trials, as well as genetic research.

    Click here to discover more about these applications.

  • research test

    Preclinical Protocols

    Our vast array of protocols can be tailored to fit the diverse nature of research. These protocols measure the function of multiple cell types from photoreceptors to the visual cortex.

    Click here to investigate available protocols.

  • research products

    Preclinical Products

    In research, it is important to obtain rapid, reliable, and repeatable results. Our pioneering research system Celerisā„¢ achieves these results by combining an electrode and stimulator into one device.

    Click here to simplify your research or preclinical trial.

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The Solution For Your Ophthalmic Needs

Ophthalmic electrophysiology is an important tool in assessing visual function for a variety of purposes. Whether for research or clinical purposes at hospitals, clinics, or universities around the world, Diagnosys has an application, protocol, or product to assist you.


  • I have used Diagnosys electrophysiology systems for clinical testing and research for nearly fifteen years. The systems are reliable, easy to use and protocols readily modified to answer research questions. The few times I have had problems with the equipment, Diagnosys has quickly responded and fixed the problem.

    Ron Hansen

  • Diagnosys LLC not only provides high quality testing equipment, but also provides excellent customer support services. All employees are knowledgeable in the field of visual electrophysiology and are able to help with any questions or issues you may have.

    Julie Racine

  • As a clinical neurophysiologist in a busy pediatric clinic, I wholeheartedly believe that the equipment made available to us by Diagnosys LLC allows for the testing necessary to aid in clinical diagnostics and research. I have always felt that this family run company has been by my side each and every step of the way, despite being located in another country.

    Dr. Allison Dorfman

  • Celeris is the Luxury Vehicle of Electrophysiology! I love Celeris for the vision science field because it grants all investigators access to a wide variety of electrophysiological tests without requiring in depth expertise of the theory of electrophysiology. It's wonderfully simple and easy to operate.

    Barbara A. Mysona