Motor-driven subjective phorometer

In a subjective phorometer having two eye heads, each eye head having a first rotatable spherical lens plate, a second rotatable spherical lens plate, a first rotatable toric lens plate, a second rotatable toric lens plate and a rotatable accessory lens plate, the improvement comprising:

• means on each eye head for rotating the first spherical lens plate and the accessory lens plate comprising a first D-C motor for each lens plate and gear means engaging the motors and plates;
• means on each eye head for rotating the second spherical lens plate comprising a first electromagnetic clutch with a double shaft mechanism for engaging the gear means for the first spherical lens plate or the accessory plate to rotate therewith;
• means on each eye head for rotating the first and second toric lens plates comprising a second D-C motor, a second electromagnetic clutch, gear means for alternatively engaging the first and second toric lens plates to effect rotation by the second D-C motor, a third D-C motor and gear means for effecting rotation the two toric lens plates together by the third motor;
• means for raising and lowering one eye head comprising a fourth D-C motor and gear means engaging the one eye head and the fourth motor;
• means for sliding the two eye heads towards and away from each other comprising a fifth D-C motor and gear means engaging the two eye heads with the fifth motor;
• means for rotating each eye head for converging motion comprising a sixth motor and gear means for each eye head to engage same with the sixth motor;
• first control switches settable to correspond to vision data;
• second control switches for effecting desired movement of the lens plates;
• central processing means receptive of the vision data from the first switches and for controlling the motors and electromagnetic clutches in response to the second switches;
• a monitor for digitally displaying vision data;
• and a printer for printing out vision data.