An apparatus comprises an input device and an actuator. The input device has
an
interface portion. The interface portion defines a selectively adjustable orifice
having a range of sizes. The interface portion defines a plane and a longitudinal
axis. An actuator is coupled to the interface portion of the input device. The
actuator is configured to apply a haptic feedback force inwardly with respect to
the longitudinal axis within the plane to at least three locations of the interface
portion when a change in a size of an object disposed within the interface portion
is sufficient to adjust the size of the orifice.