An ED glass is incorporated in many binoculars today. It minimizes color fringing, a common problem that affects the images you see from your optics.
With an ED glass, binoculars can deliver sharp and vivid images. Some good examples of binoculars with an ED glass are the Maven B.3, Athlon Midas 8×42 UHD, and Nikon MONARCH 7 10×42 ATB.