Magalasi oteteza maso ku ski ndi magalasi omwe amavala kuti ateteze maso akamaseŵera ski. Magalasi oteteza maso a ski amafunika kuteteza maso a munthu amene akuseŵera ski chifukwa cha kuwala kwa dzuwa pa chipale chofewa komanso kusonkhezeredwa kwa maso ndi mphepo yozizira akamaseŵera. Tiyenera kudziwa kuti anthu amene amaseŵera ski ayenera kusankha magalasi oteteza maso a OTG (Over The Glasses) kuti aphimbe maso awo.

Ntchito
Magalasi a ski asintha kuchoka pa single layer kupita pa double layer, kuchoka pa non chifunga kupita pa anti-chifunga, ndipo angagwiritsidwe ntchito pa nyengo zosiyanasiyana pamene sayansi ndi ukadaulo zapita patsogolo. Chimangocho chapangidwa ndi pulasitiki, chomwe ndi chotetezeka, ndipo lenziyo ndi yachikasu kapena bulauni. Zinthu zotsatirazi ziyenera kuphatikizidwa mu magalasi a ski:
Choyamba, tetezani maso anu kuti asakwiyitse mphepo yozizira; chachiwiri, tetezani maso anu kuti asapse ndi kuwala kwa ultraviolet.
Chachitatu, mandala amkati satha kupangika ndi utsi.
Chachinayi, magalasi oteteza ku ski sayenera kuvulaza nkhope munthu akagwa. (Zindikirani: Kuti aphimbe bwino myopia, anthu okonda ku ski omwe amavala magalasi ayenera kusankha magalasi oteteza ku ski a OTG (Over The Glasses).

Chachisanu, kukana kwa mandala, muyezo wapadziko lonse lapansi uyenera kupambana mayeso a drop ball (DROP BALL TEST) ndi mayeso a kugunda.