01 Umvavanyi woxinzelelo lweglasi sisixhobo esixabiseke kakhulu kwiimeko ezahlukeneyo, ngakumbi kwimveliso, ukulawula umgangatho, kunye nokuthengiswa kwamehlo.
Kwinkqubo yokuvelisa, umvavanyi woxinzelelo udlala indima ebalulekileyo ekuqinisekiseni ukunyaniseka kwesakhiwo seefreyimu zeglasi. Abavelisi basebenzisa esi sixhobo ukuchonga ubuthathaka obunokwenzeka okanye amanqaku oxinzelelo kwiifreyimu ngexesha lesigaba sokuvelisa. Ngokufumanisa le miba kwangethuba, abavelisi banokwenza uhlengahlengiso oluyimfuneko kuyilo okanye kukhetho lwemathiriyeli, ngaloo ndlela bephucula ukuqina kunye nobomi obude beemveliso zabo.
Amasebe okulawula umgangatho nawo axhomekeke kakhulu kwi-glasses stress tester. Iqinisekisa ukuba zonke iiglasi eziphuma kumzi-mveliso ziyahlangabezana nemigangatho efunekayo. Naziphi na iifreyimu ezisilelayo kuvavanyo loxinzelelo zineflegi, zivumela uhlolo oluqhubekayo kwaye, ukuba kuyimfuneko, ukulungiswa okanye ukutshintshwa. Le ndlela yokusebenza iwanciphisa ngokubonakalayo amathuba okuba iimveliso ezineziphene zifikelele kubathengi.