News

  • Collecting Electrophysiology Normative Data in West Africa

    We are pleased to announce the installation of our 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 in…

  • 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…

  • ERG for Children

    Discover the abridged ERG for children. Full-field ERG is a pivotal diagnostic tool for detecting generalized retinal dysfunction and identifying functional abnormalities within the retina. The International Society for Clinical Electrophysiology of Vision (ISCEV) ERG sets the gold standard for this testing method by defining stimulus and recording parameters. These parameters are designed to trigger…

  • E3 System on the International Space Station

    Diagnosys E3 Ophthalmic Electrophysiology System begins its use on the International Space Station. Research on changes to the eye and brain during long-duration spaceflight now uses the Diagnosys E3 system to measure retinal function. Lowell, MA – Diagnosys LLC announced that its E3 system with Envoy and ColorBurst stimulators has been successfully installed at the International…

  • 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…

  • 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 eye and…

  • S-Cone Electroretinography (ERG)

    The short-wavelength cone (S-Cone) ERG 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 to…

  • Photopic Negative Response (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 background. It can be…

  • Dark-adapted Red Flash Electroretinography (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 dysfunctions. They are apparent…