An optical surgical probe includes a cylindrical cannula a light guide partially within the cannula to receive a light beam from a light source through a proximal end, to guide the light beam to a distal end of the light guide, and to emit the light beam through the distal end of the light guide a multi-spot generator at a distal end of the cannula that includes an optical element with a proximal surface to receive the emitted light beam, and a focusing lens, positioned inside the optical element to focus the received light beam into a focused beam, wherein the optical element has a faceted distal surface to split the focused beam into multiple distally emitted beam-components when the optical surgical probe is operated in a fluid with an index of refraction of 1.30-1.40, and to confine the focused beam in the optical surgical probe when the optical surgical probe is operated in air.
