As the temple is forced further laterally outwardly, the finger portion will continue moving toward the front end of the temple until the finger tip firmly abuts {HEAD ~ the front end} of {TAIL ~ the temple}, thereby acting as a positive stop and closing the space between the finger tip and the front end of the temple 
As the temple is forced further laterally outwardly , the finger portion will continue moving toward the front end of the temple until the finger tip firmly abuts { HEAD ~ the front end } of { TAIL ~ the temple } , thereby acting as a positive stop and closing the space between the finger tip and the front end of the temple
OTH OTH OTH OTH 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 HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH