The invention relates to a method for operating a display apparatus (12), comprising the following steps: capture of image data from at least one part of the head of a user (14) (step 110), ascertainment of at least one parameter, which the user (14) can alter by moving at least one part of the head, from the image data captured in step a) (step 120), control of a visual representation on a display apparatus (12) on the basis of the ascertained at least one parameter (step 130), wherein the capture in step a) is taken as a basis for ascertaining at least one quality parameter (step 140) and the at least one quality parameter is taken as a basis for varying at least one resolution of at least one part of the visual representation (step 150). Moreover, the invention relates to a corresponding computer program product and to a corresponding system for operating a display apparatus.