Iimvani zeeklasi: Ngaba umbala weMbala?

Iimpawu zokukhetha iziCwangciso zeeLanga

Awukwazi ukugweba iibini zezikhanyiso ngombala walo, ubuncinane kungekhona ngenjongo yokukhusela iso. Iimpawu kunye ne-shade yezibuko zelanga azibonakalisi amandla okuvimbela i- UV (ultraviolet) . Xa iilazi zelanga zifakwe, iilensi ziphathwa ngeemichiza ze-UV-absorbing ziyakwazi ukuvimba ukukhanya kwe-UV. Ngenxa yokuba ezi khemikhali zihlala zingenambala, iilensi ezicacileyo zingavimbela ukukhanya kanye kunye neelensi ezimnyama.

Ngoko kutheni imibala eminingi yelensi?

Ibonisa ukukhanya kwefayili ngeendlela ezahlukeneyo, kwaye ezinye iingcebiso zenza umsebenzi ongcono ekukhuseleni ukukhanya kunabanye. Ezinye iingcamango zandisa imibala, ngelixa abanye bephazamisa. Iziphakamiso zinakho ukuphucula umbono kwiimeko ezithile. Nangona unokuba ummangalisa umbala othile wombala, kungenokuba yinto engcono kunazo zonke zokuphila kwakho. Ukulandela kuyisikhokelo esilungeleyo sokukhetha izibuko zelanga .

Umthombo:

Izigulane zePomphlet: Isikhokelo sokuThengwa kweziLanga zeMiboniso, 243 N. Lindbergh Blvd. St Louis, MO 63131. Umbutho wase-American Optometric (AOA).