In an image projection apparatus, the deflection axis of the pixels of a display device is parallel to the longer sides of the display area of the display device, and the entrance pupil of a projection optical system is displaced from the line normal to the center of the display area in the direction parallel to the shorter sides of the display device. The invention is also directed to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which the dipeptidyl peptidase-IV enzyme is involved. The inspiratory training device is mounted movably in the volume barrel and has a floating element.