The radiation sources (5) and detectors (7) are located on the diaphragm plate (1) the shape of which, in conjunction with the sources and detectors, is plane. On the diaphragm is provision for its attachment to either the inside or outside of a spectacle glass. The provision takes the form of an adhesive tape, or pads which on one side are attached to the diaphragm plate, and on the other have a self-adhesive surface. - The adhesive tape or pads fit above and below the diaphragm aperture (3). The diaphragm is rectangular, with the adhesive tape or pads near its corners, and takes the form of a printed circuit. The tape or pads are intended temporarily to fix the measurement or diaphragm plate to one side of the spectacles of the person whose sight is being tested.
展开▼
