I-Photochromic lens iyilensi eshintsha umbala ngokushintsha kokukhanya kwangaphandle. Ingajika ibe mnyama ngokushesha ngaphansi kokukhanya kwelanga, futhi ukudluliselwa kwayo kwehla kakhulu. Ukukhanya kunamandla, umbala welensi uba mnyama, futhi okuphambene nalokho. Uma ilensi ibuyiselwa endlini, umbala welensi ungafiphala ngokushesha ubuyele esimweni sokuqala sokukhanyela. Ukushintsha kombala kuqondiswe kakhulu yisici sokushintsha umbala ngaphakathi kwelensi. Ukusabela okubuyiseleka emuva kwamakhemikhali. Ngokuvamile, kunezinhlobo ezintathu zobuchwepheshe bokukhiqiza ilensi ye-photochromic: in-mass, i-spin coating, ne-dip coating. Ilensi eyenziwe ngendlela yokukhiqiza ngobuningi inomkhiqizo omude futhi ozinzile...
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