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Next Generation ERG Research

From rodents to rabbits, Celeris provides researchers with a superior testing experience. With its patented Light Guide electrode-stimulator, Celeris is a revolutionary pattern and flash ERG system that meets the highest industry standards.

Down ArrowVisual Electrophysiology Simplified

A True Innovation in Technology


The principal innovation of Celeris is the light pipe that combines an electrode and stimulator into one component.


This pioneering design simplifies setup procedures, decreasing overall test time while maximizing throughput.
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Systems for any Animal

Over decades, our systems have been utilized to test and validate a multitude of animal models.




  • Mice
  • Rats
  • Squirrels
  • Rabbits
  • Guinea Pigs

Lab Cradle

  • Zebrafish
  • Rodent
  • Primates

E3 Combinations


  • Pig
  • Dog
  • Primate

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Examine Any Part of the Visual Pathway

Precision instrumentation records clean signals and graphs microvoltage fluctuations.




Inner and Outer Retinal Function



Voltage potential changes to light

optic nerve

Optic Nerve

Optic Nerve to Visual Cortex


  • 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