Patent ID: 7654670

Claim:
An electric joystick mechanism which moves an ophthalmic examination unit horizontally, the mechanism comprising: a base; a joystick having a shaft, which is supported so as to be tiltable in back/forth and right/left directions with respect to the base; a driving unit having a motor, which is arranged to move the examination unit horizontally; and a control unit which is arranged to control the driving unit in response to tilting manipulation of the joystick by an examiner, wherein the control unit performs first control of finely moving the examination unit by controlling the driving unit based on a manipulation signal of the joystick which is sequentially inputted in accordance with variance of tilting condition of the joystick, and second control of roughly moving the examination unit by controlling the driving unit when the tilting condition of the joystick becomes a predetermined tilting condition, and in the second control, velocity of driving of the driving unit is controlled based on velocity of the tilting manipulation of the joystick in the first control.