and is formed with a beveled flat annular surface 34 surrounding the center bore 28 of the tip in the preferred embodiment of the invention the flat annular surface 34 at the tip distal end lies in a plane positioned at an angle of 15 u00b0 to a plane normal or perpendicular to the center axis of the tip however in variations of the tip distal end surface 34 the annular surface may be positioned at an angle to the normal plane ranging between 30 u00b0 and 5 u00b0 the optic fiber 16 employed in the preferred embodiment of the illuminator is a single strand optic fiber the fiber has a significant length and has opposite proximal 36 and distal 38 end surfaces at the opposite ends of its length a flexible insulating tubing 40 surrounds the fiber and extends along the fiber from a proximal end 42 of the tubing at the fiber proximal end 36 to a distal end 44 of the tubing that ends at the proximal end 30 of the cannula tip 14 the optic fiber 16 extends axially beyond the tubing distal end 44 through the interior of the cannula tip 14 to the distal end 38 of the fiber positioned at the cannula tip distal end 32 as best seen in fig2 the optic fiber distal end 38 has a flat beveled planar surface the angle of the optic fiber distal end surface 38 corresponds to the.