An optical light scanning probe is presented, the probe comprising a handle, shaped for grasping by a user； a cannula, protruding from a distal portion of the handle with an outer diameter smaller than 20 gauge； an optical fiber with a distal fiber-portion off a probe-axis, configured to receive a light from a light-source at a proximal fiber-portion, and to emit the received light at the distal fiber-portion； a fixed beam forming unit, disposed at a distal portion of the cannula, configured to receive the light from the distal fiber-portion, and to deflect the received light toward a target region； and a fiber actuator, housed at least partially in the handle, configured to move the distal fiber-portion to scan the deflected light along a scanning curve in the target region.
