Ezi glasi zokufunda zeplastiki zamkela uyilo lwefreyimu emile okwebrowline ukuze zenze umoya obukekayo kunye nesisa kumntu osinxibileyo. Ngemilo yebrowline ekhethekileyo, isakhelo sidibana ngokugqibeleleyo nobuso bomntu osinxibileyo, sidala iicontours ezigqwesileyo kwaye senze umntu osinxibileyo azithembe ngakumbi kwaye athandeke. Kwangaxeshanye, olu yilo lunokuphucula kakhulu imvakalelo yalowo uyinxibileyo yefashoni, iyenze inkokeli kwiindlela zefashoni.
Ngokumalunga noyilo lwenkangeleko, ezi glasi zokufunda zikwathatha isakhelo esinemibala yobisi kwaye zibandakanya izinto zokuyila iipateni ze-tortoiseshell, zenza isakhelo sonke sibe sefashonini kwaye sahlukile. Ukudityaniswa kobushushu bombala wobisi kunye nobunjani obukhethekileyo bepateni yeqokobhe letortoise ayibonisi nje incasa entle yalowo uyinxibileyo kodwa ikwancedisa izitayile ezahlukeneyo ezihambelanayo. Isakhelo esinjalo esiyilwe kakuhle asinakuzisa kuphela inkangeleko entsha kunye nefashoni kumntu osinxibileyo kodwa sikwaqaqambisa umtsalane wobuntu bakhe obukhethekileyo.
Ukongeza kuyilo olubalaseleyo kwinkangeleko, ezi glasi zokufunda zineendlela ezahlukeneyo zokukhetha. Imimiselo eyahlukeneyo ineemfuno zokunxiba ezahlukeneyo, kwaye kunzima ukufumana iiglasi zokufunda kwiimarike ezinokwanelisa wonke umntu. Nangona kunjalo, le mveliso inokubonelela ngeendlela ezahlukeneyo zamandla. Kungakhathaliseki ukuba ngumbono omfutshane okanye umgqobi obona kude, wonke umntu unokufumana amandla ahambelana nabo. Olu yilo lolwakho lwenza ukuba ezi glasi zokufunda zikwazi ukuhlangabezana neemfuno zamaqela ahlukeneyo kwaye zibonelele abathengi ngamava akhululekileyo nafanelekileyo.
Ngamafutshane, ezi glasi zokufunda zeplastiki zinokuqaqambisa kakhulu isimilo somntu onxibileyo kwaye ziphucule imvakalelo yefashoni ngoyilo lwesakhelo esimile okwebrowline kunye nenkangeleko esefashonini yeefreyimu ezinombala wobisi kunye neepateni zamaqokobhe ofudo. Kwangaxeshanye, iintlobo ngeentlobo zeedigri ziyafumaneka ukuba ukhethe kuzo, zibonelela ngamava obuqu ngakumbi kuzo zonke iintlobo zabanxibi. Nokuba kubomi bemihla ngemihla okanye kwiimeko zentlalo, ezi glasi zokufunda zinokukuzisela amava okubona akhululekileyo, zikuvumela ukuba ubonise umtsalane wakho kwaye uhambe ngokuzithemba.