To create advantageous constructional conditions, it is proposed that in its nose piece the optical spectacle insert should have {HEAD ~ a through hole} for at least one plug in projection of an attachment plug engaging in a plug in recess of {TAIL ~ the forehead side portion} of the sunglass frame  
To create advantageous constructional conditions , it is proposed that in its nose piece the optical spectacle insert should have { HEAD ~ a through hole } for at least one plug in projection of an attachment plug engaging in a plug in recess of { TAIL ~ the forehead side portion } of the sunglass frame
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 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