The course starts with an historical perspective of image quality, including an introduction to the Image Quality Circle framework of Engeldrum. The main goal of the first part of the course is to understand how to design reliable perception experiments for measuring image quality. To this end, the course provides an overview of evaluation methodologies and discusses common pitfalls. Consequently, the concept of image quality is extended towards concepts as naturalness and viewing experience. In the second part of the course, the focus is fully on 3D displays. This second part starts with the basics of depth perception. It then explains how to extend the Image Quality Circle framework by combining depth perception with image quality. Finally, the course ends with an extensive discussion on issues of visual discomfort, possibly occurring after prolonged viewing of 3D content.