Izikhanyisi ze-Optical zikwabizwa ngokuba zii-optical brightening agents okanye i-fluorescent whitening agents. Ezi zikhompawundi zeekhemikhali ezifunxa ukukhanya kummandla we-ultraviolet we-electromagnetic spectrum; ezi ziphinde zikhuphe ukukhanya kummandla oluhlaza ngoncedo lwe-fluorescence