Magalasi otsetsereka ndi magalasi omwe amavala kuti ateteze maso pamene akusefukira. Magalasi otsetsereka amayenera kuteteza maso a skier chifukwa cha kuwala kwa dzuwa pa chipale chofewa komanso kukondoweza kwa maso ndi mphepo yozizira panthawi yotsetsereka. Zindikirani kuti otsetsereka otsetsereka omwe amavala magalasi ayenera kusankha magalasi a chipale chofewa a OTG (Over The Glasses) kuti aphimbe myopia yawo yonse.

Ntchito
Ma lens otsetsereka asintha kuchokera ku wosanjikiza umodzi kupita pawiri, kuchoka ku kusakhala chifunga kupita ku anti-fog, ndipo amatha kugwiritsidwa ntchito munthawi zosiyanasiyana zanyengo pomwe sayansi ndiukadaulo zapita patsogolo. Chojambulacho chimapangidwa ndi pulasitiki, chomwe chili chotetezeka, ndipo disololo limakhala lachikasu kapena lofiirira. Zotsatirazi ziyenera kuphatikizidwa mu magalasi otsetsereka:
Choyamba, pewani mphepo yozizira kuti isakhumudwitse maso anu; chachiwiri, tetezani kuti cheza cha ultraviolet chisawotche maso anu.
Chachitatu, mandala amkati sakhala fogable.
Chachinayi, magalasi otsetsereka sayenera kuyambitsa kuvulala kumaso pambuyo pa kugwa. (Zindikirani: Kuti aphimbe myopia kwathunthu, otsetsereka otsetsereka omwe amavala magalasi ayenera kusankha magalasi otsetsereka a OTG (Pamwamba pa Magalasi).

Chachisanu, kukana kwa ma lens, muyezo wapadziko lonse lapansi uyenera kupitilira mayeso a mpira wadontho (DROP BALL TEST) ndi kuyesa kukana mphamvu.