Electroretinography

The process of recording electrical changes in the retina when stimulated by light.


A method of recording changes in the electrical potential of the retina when it is stimulated by light. One electrode is placed on the eye in a contact lens and the other is usually attached to the back of the head. In retinal disease the pattern of electrical change is altered. The technique is useful in diagnosing retinal diseases when such things as cataract make it difficult to see the retina or when the disease produces little visible change in the retina.


 


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