Data eyeglasses include a first display, a camera, and an analyzing unit. The data eyeglasses is configured to: record the surroundings of the data eyeglasses via the camera, detect an image displayed by a second display in the recordings of the camera; detect that the displayed image has a marker for determining the pose of the data eyeglasses; detect the marker; and determine the pose of the data eyeglasses by use of the detected marker.