Abstract: A visual function test device 1 is provided with a housing 10 with a peephole; a visual target display 11 accommodated in the housing 10 to display a predetermined visual target; and virtual image optics accommodated in the housing 10, the virtual image optics being optics including lenses 121, 122 for forming a virtual image of the predetermined visual target at a position visible from the peephole, the virtual image optics having an exit pupil of a predetermined dimension. The visual function test device has an eye relief of 5 cm or more. By using the visual function test device 1, a visual function test can be performed without the need to mount equipment on a subject.

Abstract: A display device includes: an image forming unit; a collimator optical system deflecting light emitted from the image forming unit to a parallel light flux; and a light guide magnifying the parallel light flux. The image forming unit includes: an optical member having, in its inside, a wall face on which the light is totally reflected, the light being incident in the wall face at an incident angle larger than or equal to a predetermined angle; a light source emitting the light so that the light is incident in the wall face at the incident angle larger than or equal to the predetermined angle; and a reflection display element having a plurality of two-dimensionally arranged reflection portions each having a reflection surface capable of changing its orientation between a first direction and a second direction in accordance with an external control signal.