An adjustable containment shield is operable to mount on an output housing of a surgical instrument. The shield includes a substantially transparent body including a distal face, a proximal face opposite the distal face, a generally consistent thickness defined between the distal face and the proximal face such that the body is pliable and resilient, a mounting hole defined in the body to engage the output housing, and a plurality of folds to allow the shield to move from a retracted position to an expanded position. When mounted on the output housing, the distal face is at an acute angle with respect to a longitudinal axis through the mounting hole and face is also facing toward a patient engagement end of the surgical instrument. The proximal face is at an obtuse angle with respect to the longitudinal axis and facing toward a housing side of the surgical instrument.