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