Ngaba ujonge isakhelo se-optical esikhethekileyo nesinesitayile?Isakhelo sethu se-acetate se-unisex esijikelezileyo esinemilenze enepateni yeyona nto uyifunayo.Yenziwe nge-acetate ekumgangatho ophezulu, ezi freyimu zihlala zihlala kwaye zikhululekile ukunxiba.