Steerable laser probe

An instrument comprising:

• a handle having a handle distal end and a handle proximal end;
• a handle base of the handle;
• an inner bore of the handle;
• an actuation structure of the handle;
• an actuation platform of the handle having an actuation platform distal end and an actuation platform proximal end;
• a plurality of actuation arms of the actuation structure, each actuation arm of the plurality of actuation arms having at least one extension mechanism;
• an inverted actuation joint of each actuation arm of the plurality of actuation arms;
• a single housing tube having a housing tube distal end and a housing tube proximal end, the housing tube having dimensions configured to perform ophthalmic surgical procedures to treat proliferative retinopathy;
• a first portion of the housing tube having a first stiffness;
• a plurality of slits laser cut into the first portion of the housing tube, each slit of the plurality of slits having an arch configured to minimize a force of friction between the housing tube and a cannula;
• a second portion of the housing tube having a second stiffness, the second stiffness greater than the first stiffness;
• an optic fiber having an optic fiber distal end and an optic fiber proximal end, the optic fiber disposed within the inner bore of the handle and the housing tube wherein the optic fiber distal end is adjacent to the housing tube distal end and the optic fiber distal end is fixed within the housing tube;
• and
• a wire having a wire distal end and a wire proximal end, the wire disposed within a portion of the handle and the housing tube wherein the wire distal end is adjacent to the housing tube distal end and the optic fiber distal end and wherein the wire distal end is fixed within the housing tube and wherein a compression of the actuation structure is configured to retract the actuation platform relative to the handle base and retract the wire relative to the housing tube.