Ophthalmological surgical instrument

An ophthalmological surgical instrument comprising:

• a hollow body having an oblong shape and a portion shaped to function as a handle;
• and
• a cutting assembly positioned on an end of the hollow body and comprising at least one arm connected to the hollow body and including at least one cutting element;
• wherein the at least one arm is pivotally hinged to a base fixed to the hollow body;
• wherein the at least one arm is configured rotatively cooperate with a toothed rack that is slidingly positionable with respect to the base;
• and
• wherein the at least one arm is further connected to at least one conjugate pinion gear that is positioned along a rotation axis and rotatively moveable with the at least one arm along the rotation axis relative to the base;
• wherein the toothed rack is manually operable to be slidingly moved by a user;
• wherein one of the at least one arms is separable from the hollow body and interchangeable with another of the at least one arms;
• and
• wherein the at least one cutting element is separable from the at least one arm and interchangeable with another at least one respective cutting element.