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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 individuals with advanced retinal degeneration. At its core, the FST assesses visual field sensitivity by determining the lowest luminance flash which elicits a visual sensation perceived by the patient. The test may be done in […]

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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 64.15 which affected ColorFlash high-intensity flicker   To request our latest software version, please fill out the form below:

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EER Patent

EER Patent Diagnosys is proud to announce that the USPTO has patented another one of our inventions! Our Electrically Evoked Response (EER) Stimulator/Amplifier Combination earned US patent 11,497,911 on Nov 15th 2022. The EER apparatus stimulates and records electrical responses at the same time, utilizing a new design which both sends a current to the […]

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Chiasmal Coefficient

Chiasmal Coefficient Calculator with a 3-Channel VEP The Chiasmal Calculator is a tool that can calculate optic nerve misrouting with the use of a 3-channel Pattern VEP or Flash VEP. Using the raw data of the response, the tool calculates a coefficient and plots a graph. Both of these outputs can be used to draw […]

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Software Version V6.64.15 Release

Software Version V6.64.15 released on December 6, 2022   New Features and Bug Fixes: Ability to support new LI-LCD This software version now supports LI-LCD luminance artifact rejection ColorDome Calibration Enhanced ColorDome’s internal calibration check to show red, yellow, and green calibration status Fixed eXporter Software Bug eXporter now always assigns tests to the correct […]

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S-Cone ERG

S-Cone ERG The short-wavelength cone (S-Cone) protocol tests the blue-light receptor retinal pathway. This test can be useful for diagnosing inherited retinal disorders and distinguishing between rod monochromacy and S-cone monochromacy.  The S-Cone protocol can be run on a ColorDome stimulator that delivers flashes of blue light on an amber-colored background. The background light serves […]

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Photopic Negative ERG (PhNR)

Photopic Negative ERG (PhNR) A Photopic Negative Response (PhNR) is a test of generalized retinal ganglion cell health and function. Reduced PhNR amplitudes might be indicators for: glaucoma, optic atrophy, central retinal artery occlusion, ischemic optic neuropathy, diabetic retinopathy, or idiopathic intracranial hypertension.  This protocol uses a low intensity red flash on a rod-saturating blue […]

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Dark-adapted red flash ERG

DA Red Flash ERG The dark-adapted red flash is an extension of the standard full-field ERG. It incorporates a dim red flash of light which elicits an x-wave that illuminates further detail of the rod pathway physiology.  This protocol can be used in the diagnosis of achromatopsia (rod monochromacy), cone dystrophy, and other cone system […]

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On-Off ERG

On-Off ERG The On-Off ERG is a separate protocol used to investigate post-phototransduction or post-receptor dysfunction. This protocol elicits a response from the bipolar and inter-retinal cells. ISCEV indicates that his protocol may further reveal details about: CSNB, melanoma-associated retinopathy, and some forms of autoimmune retinopathy. This protocol may also be useful in X-linked retinoschisis, […]

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Pattern ERG (pERG)

Pattern ERG (PERG) The Pattern ERG (pERG) produces a macular retinal ganglion cell response. When done as a follow-up to an abnormal pattern VEP, the pERG can elucidate whether the abnormality is caused by retinal or optic nerve dysfunction. This test may also assist in diagnosing glaucoma, optic neuropathies, and primary ganglion cell diseases.  A […]

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  • 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