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