Pakalipano magalasi a dzuwa amatha kugawidwa m'magalasi a dzuwa, magalasi amtundu wopepuka ndi magalasi apadera pogwiritsa ntchito mitundu itatu.Chomwe chimatchedwa galasi la sunshade chimatanthawuza magalasi omwe amagwiritsidwa ntchito kwambiri pamoyo wamba.Anthu omwe ali m'malo ochitira zinthu zakunja, makamaka m'chilimwe, anthu ambiri amagwiritsa ntchito galasi la shading kuti atseke dzuwa, kuti achepetse kutopa komwe kumachitika chifukwa cha kusintha kwa maso kapena kuwonongeka komwe kumachitika chifukwa cha kukondoweza kwamphamvu kwa kuwala.Ndipo magalasi amtundu wowala padzuwa kutsekereza zotsatira si zabwino ngati galasi sunshade, koma mtundu wake wolemera, oyenera mitundu yonse ya zovala collocation ntchito, ndi amphamvu kukongoletsa kwenikweni.Magalasi opangira magalasi apadera ali ndi ntchito yolimba yotchinga dzuwa, yomwe nthawi zambiri imagwiritsidwa ntchito pamphepete mwa nyanja, skiing, kukwera mapiri ndi madera ena kumene dzuwa liri lamphamvu, ntchito yawo yotsutsa-ultraviolet ndi zizindikiro zina zimakhala ndi zofunikira zapamwamba.Anthu osiyanasiyana, malinga ndi zokonda zosiyanasiyana ndi ntchito zosiyanasiyana kusankha magalasi, koma chofunika kwambiri ndi kuonetsetsa chitetezo cha wovala ndi mfundo yaikulu ya masomphenya si kuonongeka.to mzinda.