alarm-ringing ambulance angle2 archive arrow-down arrow-left arrow-right arrow-up at-sign baby baby2 bag binoculars book-open book2 bookmark2 bubble calendar-check calendar-empty camera2 cart chart-growth check chevron-down chevron-left chevron-right chevron-up circle-minus circle city clapboard-play clipboard-empty clipboard-text clock clock2 cloud-download cloud-windy cloud clubs cog cross crown cube youtube diamond4 diamonds drop-crossed drop2 earth ellipsis envelope-open envelope exclamation eye-dropper eye facebook file-empty fire flag2 flare foursquare gift glasses google graph hammer-wrench heart-pulse heart home instagram joystick lamp layers lifebuoy link linkedin list lock magic-wand map-marker map medal-empty menu microscope minus moon mustache-glasses paper-plane paperclip papers pen pencil pie-chart pinterest plus-circle plus power printer pushpin question rain reading receipt recycle reminder sad shield-check smartphone smile soccer spades speed-medium spotlights star-empty star-half star store sun-glasses sun tag telephone thumbs-down thumbs-up tree tumblr twitter tiktok wechat user users wheelchair write yelp youtube


Diopsys Electrophysiology tests are painless, non-invasive, and provide comprehensive information on the function of your vision.

Like an electrocardiogram (EKG) which tests heart function, Diopsys electrophysiology tests work by evaluating how the cells within your vision system are functioning. Eye disease disrupts that function as cells become unhealthy. By catching this dysfunction before the cells die, we can prescribe treatment to make the cells healthy again.

Additionally, we can use these tests to help determine if your treatment is working. These types of scans help detect dysfunction early, track disease progression, and tailor treatment using objective results of visual function.

As the world leader in modern visual electrophysiology, Diopsys, Inc. has done more than any other company to advance the use of electroretinography(ERG) and visual evoked potential (VEP) in the eye care practice. The company’s unique, patented technology provides eye care professionals with objective, functional information about the health of the vision system to aid in the early detection of vision disorders, and post-treatment tracking for enhanced patient management.

Results from these tests are not just for rare diseases, but also to help doctors manage more common disorders like diabetic retinopathy, retinal concerns obscured by media opacities, glaucoma, and optic neuritis. VEP and ERG testing allow for the detection of certain eye conditions up to 8 years prior to any permanent vision loss occurs.​