Patent ID: 8579440

Claim:
An eyesight testing apparatus comprising: (a) an imaging device for virtual imaging of a test object that is located within a focal length of the imaging device and that can be imaged at different distances into eyes of a subject located in a focal point of the imaging device; (b) an optical deflection device that is arranged in a first beam path between the imaging device and the test object and the optical deflection device deflects the first beam path by 180 degrees, wherein the optical deflection device is displaceable in the direction of the first beam path, and the test object is not displaceable; (c) a monitor device, wherein the monitor device generates the test object, and the monitor device comprises a single monitor and a glare source that can be imaged in the eyes of the subject together with the test object; (d) a plurality of optical components lying in the first beam path, wherein each optical component is of such a size that both eyes of the subject are able to take part in a test and so that a partial beam path is formed for each eye; and (e) a blocking device is arranged in the first beam path, wherein the blocking device comprises two liquid crystal display blocking elements that are assigned to each of the partial beam paths.