Display devices with reflectors

A display device comprising:

• a display, operable to generate a real image;
• and
• an optical system, comprising at least two free-form reflective surfaces, S1 and S2, such that at least one of surfaces S1 and S2 is convex in at least one direction at substantially all points;
• wherein those reflective surfaces are arranged to generate a virtual image from the real image on the display, by projecting light from the display to an eye position;
• wherein the field of view occupied by the virtual image as seen from the eye position is greater than 50 degrees in at least one direction;
• wherein the optical system is arranged to produce a virtual image that contains a foveal part projected by a normal human eye onto a 1.5 mm fovea of said eye when said eye is at the eye position with a pupil of the eye within a pupil range, said foveal part of said virtual image having a higher resolution than a peripheral part.