A method of producing {HEAD ~ an image} for viewing by an eye in {TAIL ~ an image field} with a portable head mounted display, comprising the steps of: 
for viewing in
A method of producing { HEAD ~ an image } for viewing by an eye in { TAIL ~ an image field } with a portable head mounted display , comprising the steps of :
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH