Ophthalmic surgical systems, methods, and devices

A handheld medical instrument for surgical procedures, the handheld medical instrument comprising:

• a body having an exterior surface shaped to be held and manipulated by a human hand;
• a surgical tool extending from a distal end of the body;
• an aspiration pump inside the body;
• an inertial sensor configured to track a rotational motion of the body, the surgical tool being configured to control a variable of a function based on the rotational motion of the body, such that the variable is one of increased or decreased with detected clockwise rotational motion and is correspondingly decreased or increased with detected counterclockwise motion;
• wherein the variable is aspiration rate and wherein the aspiration rate of the aspiration pump is controlled using the tracked rotational motion of the body;
• and
• a pressure-sensitive button for controlling operation of the surgical tool, the pressure-sensitive button comprising:
• an actuation surface positioned adjacent the exterior surface of the body;
• and
• a pressure detection device, the pressure detection device configured to enable output of a signal for controlling a function of the surgical tool, the signal being proportional to a position of the actuation surface.