Abstract: Sight testing apparatus, in particular sight testing apparatus with a free through-view, for examining near-sightedness and far-sightedness and color and stereoscopic vision, can operate with test objects which are located within the focal length of an imaging device and are imaged at different distances into the eye, located at the focus of the imaging device, of a subject under test. For this purpose, the size of the image must be able to be altered. For this purpose, an optical full deflection device is provided in the beam path between the image device and the test object, deflects the beam path through 180.degree. and is constructed so as to be displaceable.

Abstract: A vision-testing apparatus includes a concave mirror and at least one test object (2) which can be changed in position and is arranged between the concave mirror (1) and its focal point (f) in a first optic path (W1). In order to be able to carry out different vision tests with an apparatus which is simple in design and compact in manufacture, it is provided that the eye (7) of a person being tested is arranged at a focal point (F) of the concave mirror (1) and that between the concave mirror (1) and the test object (2) there is arranged a first partially translucent dividing mirror (3) to form a second optic path (W2) from the concave mirror (1) to the eye (7) of the person being tested.