A stick controller for adjusting the position of an examination unit with respect to an eye to be examined in an ophthalmic eye-examining device includes an operation unit configured to be operated by a user so as to be positioned in a first driving area or a second driving area; a first magnetic coupling part coupled to the operation unit and configured to move along a first area together with the operation unit; a second magnetic coupling part detachably coupled to the first magnetic coupling part by magnetic force and configured to move along a second area; and a control signal generation unit configured to output a first drive control signal when the operation unit is positioned in the first driving area and output a second drive control signal when the operation unit is positioned in the second driving area.

A multi-directional input device includes a housing, a control member to be tilted, a first interlock member having a first shaft support portion supported by the housing turnably about a first turn axis and is turned with a tilting operation of the control member, a second interlock member having a second shaft support portion supported by the housing turnably about a second turn axis intersecting the first turn axis and is turned with a tilting operation of the control member, a first urging member to urge the control member to push the first shaft support portion against the housing and provide a return force for returning the control member to a neutral position, a second urging member to urge the second interlock member to push the second shaft support portion against the housing, and a turn detector to detect a turn of each of the first and second interlock members.

A system includes a joystick having a body defining a handle. At least one socket is operably coupled to the handle. The joystick further includes one or more sensors including: an orientation sensor that is configured to sense orientation of the handle or an input device. Each sensor is operably coupled to the at least one socket.

The subject matter of this specification can be embodied in, among other things, a handlebar-shaped housing having an elongate central body having a first hand grip at a first axial end, a first flexible paddle affixed to the first hand grip, a first deflection sensor configured to identify a first amount of deflection of the first flexible paddle, a second hand grip at a second axial end, a second flexible affixed to the second hand grip, a second deflection sensor configured to identify a second amount of deflection of the second flexible paddle, and circuitry configured to identify one or more of a pitch, a roll, and a yaw of the elongate central body, and a controller configured to receive an orientation sensor signals, deflection signals from the deflection sensors, and provide a control signal based on one or more of the sensor signals.