Discover our complete suite of visual function test systems

Preclinical

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

Clinical

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

Trial Services

Our trial services include study setup assistance, training, and data review. These trial 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

Expertise

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

Technology

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.

Network

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

  • Graph showing the distribution of multiple electroretinography sweeps

    Espion V7 Feature Preview Highlight: Post Hoc Filters

    Visual electrophysiology recordings capture signals that span only a few hundred microvolts, making a high signal-to-noise ratio crucial for accurate assessment. Since these signals are so small, minimizing noise in the testing environment is essential.…

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  • A patient is undergoing multiring electroretinography.

    The One-minute Toxicity Screening Visual Electrophysiology Test

    As an improvement on the standard 61-hexagon multifocal electroretinography (mfERG) test, the ring ERG (rERG) method could shorten toxicity screening tests from over 5 minutes to around 1 minute, significantly reducing test burden. This new…

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  • Astronaut with DTL electrodes

    Visual Electrophysiology in Microgravity

    Featured image: Astronaut Steve Bowen wearing DTL electrodes while performing an electroretinography (ERG) test in microgravity on the International Space Station. Courtesy of NASA.  The study of Spaceflight Associated Neuro-Ocular Syndrome (SANS) represents a new…

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Meet us at our upcoming events

  • The Japanese Ophthalmological Society
  • ARVO 2025
  • ANS 2025