A frame of a pair of glasses has a pair of eye rims with front surface and nasal regions which are connected together by {HEAD ~ a bridge} with {TAIL ~ a front surface} and a nasal region 
A frame of a pair of glasses has a pair of eye rims with front surface and nasal regions which are connected together by { HEAD ~ a bridge } with { TAIL ~ a front surface } and a nasal region
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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