The present invention discloses a vitrectomy probe comprising: a housing a cutter extending longitudinally from a first end of the housing, the cutter comprising:an outer cutting member coupled to the housingan inner cutting member slideable within the outer cutting member, the inner cutting member slideable between a retracted position and an extended position and an adjustable port, a size of the adjustable port defined by an edge of an opening formed in the outer cutting member and an end surface of the inner cutting member when the inner cutting member is in a fully retracted positionan oscillator operable to reciprocate the inner cutting membera stroke limiter operable to limit the size of the adjustable port, the stroke limiter comprising: a moveable member threadably retained within the housingand rotatable about a first axis, the moveable member moveable in a first longitudinal direction in response to a rotationin a first rotational direction and the moveable member moveable in a second longitudinal direction opposite the first longitudinal direction in response to a rotation in a second rotation direction, a location where the moveable member contacts the inner cutting member defining the fully retracted position and a rotatable member operably engaged with the moveable member and rotatable about a second axis different from the first axis, a rotation of the rotatable member operable to impart rotation to the moveable member.
