In close binocular vision, there is a superimposition of {HEAD ~ two images} which are combined by {TAIL ~ the brain}, similarly as for distance vision 
are combined by
In close binocular vision , there is a superimposition of { HEAD ~ two images } which are combined by { TAIL ~ the brain } , similarly as for distance vision
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH