Eigengrau

Eigengrau, also called Eigenlicht, dark light, or brain gray, is the uniform dark gray background that many people report seeing in the absence of light. The term dates back to the nineteenth century, but has rarely been used in recent scientific publications.

About Eigengrau in brief

Summary EigengrauEigengrau, also called Eigenlicht, dark light, or brain gray, is the uniform dark gray background that many people report seeing in the absence of light. The term dates back to the nineteenth century, but has rarely been used in recent scientific publications.

Common scientific terms for the phenomenon include “visual noise” or “background adaptation”