Electroretinography (ERG) Testing in New Jersey

An electroretinography test (ERG) measures the electrical responses of the retina’s light‑sensitive cells—rods and cones. These cells are located in the back of the eye and are essential for sharp, clear vision. The retina contains approximately 120 million rods, which help you see in low light, and 6–7 million cones, which are responsible for color vision and fine detail.

Your eye doctor may recommend an ERG to diagnose inherited or acquired retinal disorders such as retinitis pigmentosa, macular degeneration, retinoblastoma, retinal detachment, cone‑rod dystrophy, or to evaluate whether you may need retina surgery or cataract removal.

What Happens During an Electroretinography Test?

At Marano Eye Care, your ERG test is performed in a comfortable, controlled setting.

Here’s what to expect:

• An electrode is placed under your eye. Then a device is held close to your eye. You will view a series of flashing lights as the device measures your electrical response to the images.

The entire procedure typically takes 15 minutes.

Are There Risks with an Electroretinography Test?

ERG testing is considered very safe, with no significant risks.

What Happens After the ERG Test?

After the procedure:

• Your doctor will review your results and may recommend additional testing, medication, or treatment depending on the findings

ERG results help your physician determine the health of your retina and guide the next steps in your care.

Electroretinography (ERG) Testing in Livingston, Denville & Newark, NJ

At Marano Eye Care, we are committed to providing advanced diagnostic testing and exceptional retinal care. Our team uses state‑of‑the‑art technology to detect retinal conditions early and protect your long‑term vision.

To learn more about ERG testing or to schedule an appointment at our Livingston, Denville, or Newark locations, contact Marano Eye Care today. We’re here to support your eye health with expertise, compassion, and comprehensive care.