The distal end of the optic fiber and {HEAD ~ the distal end} of {TAIL ~ the illuminator cannula} are both provided with flat, beveled surfaces 
The distal end of the optic fiber and { HEAD ~ the distal end } of { TAIL ~ the illuminator cannula } are both provided with flat , beveled surfaces
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH