{HEAD ~ The shallow rabbet} has a forward rabbet wall spaced from the front surface of the eye rims and the bridge, and {TAIL ~ a saggital rabbet wall}, which is substantially longer than the forward rabbet wall 
has
{ HEAD ~ The shallow rabbet } has a forward rabbet wall spaced from the front surface of the eye rims and the bridge , and { TAIL ~ a saggital rabbet wall } , which is substantially longer than the forward rabbet wall
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH