1. Kuwala kwa Ultraviolet kumatha kuwononga cornea ndi retina.Diso likalandira kuwala kochuluka, mwachibadwa limakhudza iris.Magalasi apamwamba amatha kusefa mpaka 97% ya kuwala kolowa m'maso kuti asavulale.
2. Magalasi amtundu wopepuka kwenikweni ndi mitundu yosiyanasiyana yamafashoni a dzuwa.Ngakhale kuti amatchinga dzuwa mocheperapo kusiyana ndi ma visor adzuwa, cholinga chawo chachikulu ndikuchita ntchito yokongoletsa.Amakondedwa ndi achinyamata odalira mitundu yolemera ndi masitayelo apamwamba.M'zaka zaposachedwa, akazi amafashoni akonda kwambiri magalasi oterowo omwe ali oyenererana ndi zovala zosiyanasiyana.
3. Magalasi apadera a dzuwa ndi mtundu wowonjezereka wa ma visor wamba wamba.Zizindikiro zawo ndizokwera kuposa za magalasi wamba, ndipo zimakhala ndi ntchito yayikulu yotsekereza kuwala kwamphamvu.Nthawi zambiri, amakhala ndi zofunika zosiyanasiyana pazochitika zapadera.Nthawi zambiri amagwiritsidwa ntchito pamasewera akunja komwe dzuwa limakhala lamphamvu ndipo limafunikira mawonekedwe abwino, monga gombe, skiing, kukwera mapiri ndi gofu.
