Systems, apparatuses, and methods of and for an ophthalmic surgical system are disclosed. An example ophthalmic surgical system may include a body sized and shaped for grasping by a user. The body may include a lumen and a vent in fluid communication with the lumen. The vent may be located and arranged to be selectively occluded, such as when a user places a finger over the vent, and selectively unoccluded, such as when the user removes the finger from over the vent. Fluid pressure within the lumen may be increased when the vent is occluded and decreased when the vent is unoccluded. A piston within the may be displaced in response to the fluid pressure changes within the lumen.
