Electroretinography

What is Electroretinography (ERG)?

Electroretinography (ERG) is a medical procedure used to evaluate the health of the retina. It measures electrical activity in the retina and can detect a variety of retinal diseases, including retinitis pigmentosa, macular degeneration, and diabetes-related retinopathy. ERG can also be useful in detecting early signs of certain eye diseases before they cause any visible changes in the eye.

Preparation for Electroretinography (ERG)

Most preparation for an ERG test is relatively straightforward. Your eye doctor will provide you with detailed instructions on what to do before the procedure. Generally, you will need to stop wearing contact lenses at least 24 hours before the test. Additionally, if you wear tinted glasses or sunglasses, you should avoid using them for 24 hours before the test. It is also important to avoid taking certain medications, such as sedatives and muscle relaxants, for at least three days before the test.

Procedure for Electroretinography (ERG)

An ERG test usually takes about 15 minutes. During the procedure, your eye doctor will place electrodes on the white of your eye and on the skin around it. The electrodes are used to measure the electrical activity in the retina. Various patterns of light are then shined into the eye, and the electrical activity is recorded. Your eye doctor will evaluate the results of the test to determine the health of your retina.

Types of Electroretinography (ERG)

The two main types of ERG are full-field ERG (FFERG) and multifocal ERG (mfERG). Full-field ERG is used to assess the integrity of the entire retinal surface. It is useful for diagnosing retinal diseases such as retinitis pigmentosa or diabetes-related retinopathy. Multifocal ERG is more sensitive than full