Referring to FIG 10, it is preferable to orient {HEAD ~ the ellipse} in {TAIL ~ the horizontal axis} relative to the eye 
in
Referring to FIG 10 , it is preferable to orient { HEAD ~ the ellipse } in { TAIL ~ the horizontal axis } relative to the eye
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH