Abstract: A visual acuity examination apparatus is provided with a mark display face which has an outer face on which at least one mark is displayed so as to be viewed and which is formed such that the at least one mark and the periphery thereof are illuminated with a predetermined brightness, and a light shielding face which is disposed in front of the display face to be subjected to high speed movement, which is formed with a slit having a proper width and whose front face is formed so as to be illuminated with the same brightness as that of the mark display face. Accordingly, an accurate display contrast of the mark can be realized with a simple structure and without deterioration with age.

Abstract: A visual acuity examination apparatus is provided with a mark display face which has an outer face on which at least one mark is displayed so as to be viewed and which is formed such that the at least one mark and the periphery thereof are illuminated with a predetermined brightness, and a light shielding face which is disposed in front of the display face to be subjected to high speed movement, which is formed with a slit having a proper width and whose front face is formed so as to be illuminated with the same brightness as that of the mark display face. Accordingly, an accurate display contrast of the mark can be realized with a simple structure and without deterioration with age.

Abstract: A magnifying display apparatus for displaying enlarged images of characters or the like comprises a photoelectric-converting reading unit including a body and an optical system disposed in the body and having a light-path inversion prism, a magnifier lens system, an iris, an imaging device and illuminating lamp. The apparatus further comprises a controller connected to the reading unit and including a power supply circuit for the reading unit and also a control circuit for controlling the conversion of the output from the imaging device into an image output. The apparatus also comprises a display unit such as a television separably connected to the controller. A recess or a protrusion is formed on a front upper portion of the body at a position corresponding to the light-path inverting prism so as to be sensible by a user's finger, thus serving as an index of the portion of the original to be magnified and displayed.