TITLE OF THE INVENTION A MOTOR-DRIVEN SUBJECTIVE PHOROMETER A new subjective phorometer which can be a desk-type one in which all the measuring means are set on the desk plate and all the procedures for measuring vision data of eyes are carried out by control switches on the desk, and all the data measured are displayed digitally on a monitor, and printed out. The subjective phorometer comprises (1) the same measuring elements as conventional subjective phorometers, (2) a number of pulse motors, electro-magnetic clutches having a double shafts mechanism, and direct current motors for driving the measuring elements and a number of sensers for detecting the zero position of the measuring elements, (3) a central processing unit and control switches for control driving of the pulse-motors, electro-magnetic clutches, and direct current motors, and (4) a monitor for displaying digitally the vision data measured, and (5) a printer for printing the data.
MOTOR-DRIVEN SUBJECTIVE PHOROMETER