Abstract: A visual acuity chart displaying apparatus for displaying various visual charts for a visual performance examination, for an eye to be examined includes, a visual chart plate (4) in which a plural kinds of visual charts displayed for the eye to be examined are arranged changeably, a first mask plate (21) which is disposed in the front of the visual chart plate (4) with an overlapping state and in which a plurality of non-mask portions for performing each single longitudinal row transmission of the visual charts displayed on the visual chart plate (4) are arranged changeably, and a second mask plate (22) which is disposed in the front of the first mask plate (21) with an overlapping state and in which a plurality of non-mask portions for performing each single transverse column transmission of the visual charts displayed on the visual chart plate (4) are arranged changeably.

Abstract: A visual acuity chart displaying apparatus for displaying various visual charts for a visual performance examination, for an eye to be examined includes, a visual chart plate (4) in which a plural kinds of visual charts displayed for the eye to be examined are arranged changeably, a first mask plate (21) which is disposed in the front of the visual chart plate (4) with an overlapping state and in which a plurality of non-mask portions for performing each single longitudinal row transmission of the visual charts displayed on the visual chart plate (4) are arranged changeably, and a second mask plate (22) which is disposed in the front of the first mask plate (21) with an overlapping state and in which a plurality of non-mask portions for performing each single transverse column transmission of the visual charts displayed on the visual chart plate (4) are arranged changeably.

Abstract: In an apparatus for displaying a visual acuity chart table, in response to the change of the distance between an eye to be examined and an apparatus body, a concave mirror of a visual chart optical system is moved along a desired optical axis direction and a concave lens is inserted in the optical path of the visual chart optical system, so that the forming magnification of the visual chart images of various kinds of visual charts is kept constant. Thus, irrespective of the distance between the eye to be examined of a person to be examined and the apparatus body, the visual chart images of the visual charts having a constant size can be displayed to the eye E to be examined at a constant distance, and an accurate eye examination to the eye to be examined is carried out irrespective of the dimensions of an eye examination space.