In {HEAD ~ a further embodiment} the lens substrate is provided with {TAIL ~ an infra red reflection layer} 
In { HEAD ~ a further embodiment } the lens substrate is provided with { TAIL ~ an infra red reflection layer }
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL