_{Fektheri ea VR}

Likhalase tsa ho bala letsatsi ka bifocal li ka sebelisoa haufi le hole, ho etsa hore ho be bonolo ho li sebelisa ntle le ho li nkela sebaka khafetsa.
Likhalase tsa ho bala letsatsi tsa Bifocal ke mofuta o khethehileng oa likhalase tse kopanyang pono e hole le e haufi, likhalase tsa letsatsi le likarolo tse ling hore e be ntho e le 'ngoe, e pholosang ba apereng bothata ba ho lula ba fetola likhalase. Taba ea ho bala haufi-ufi e ka rarolloa feela ka likhalase tse tloaelehileng tsa ho bala. Ha ho bonolo haholo ho rola likhalase tsa hau ebe u sebelisa likhalase tsa myopia ha u batla ho bona lintho u le hole. Taba ena e rarollotsoe ka kenyelletso ea likhalase tsa ho bala tsa letsatsi tse bifocal, tse nolofaletsang basebelisi ho fihlela litlhoko tsa bona tsa pono libakeng tse fapaneng le ho ntlafatsa boiketlo mosebetsing le bophelong ba letsatsi le letsatsi.

U ka bala ka ntle letsatsing ha u ntse u sireletsa mahlo a hao hamolemo ha u roala likhalase tsa letsatsi.
Lilense tsa letsatsi le tsona li kenyelelitsoe likhalaseng tsa ho bala tsa letsatsi tse bifocal ho sireletsa mahlo a basebelisi le ho feta. Ha re le ka ntle sebakeng se nang le letsatsi, hangata re utloa bohloko ba mahlo, 'me ho pepesehela khanya e khanyang nako e telele ho ka lematsa mahlo a rona. Lilense tsa letsatsi tsa likhalase tsa bifocal ke mokhoa o sebetsang oa ho thibela mahlaseli a UV, ho fokotsa khatello ea mahlo, le ho sireletsa boleng ba pono ea hau. Basebelisi ha ba sa tlameha ho tšoenyeha ka pono ea bona ha ba ntse ba bala kapa ba sebelisa lisebelisoa tsa elektroniki kantle.

Numella LOGO ea tempele 'me u iketsetse ho paka ka ntle
Logo ea tempele le liphutheloana tse ka ntle li ka etsoa ho lumellana le litlhoko tsa motho ka mong tsa basebelisi ba fapaneng ba nang le likhalase tse peli tse khanyang tsa letsatsi. Ka ho iketsetsa LOGO litempeleng, o ka totobatsa ho ikhetha le ho ikhetholla ha lintho tsa hau le ho bonts'a khamphani ea hau kapa setšoantšo sa lebitso la hau. Sehlahisoa se ka ba le likarolo tse ling tsa bonono tse ekelitsoeng, boiphihlelo ba mosebelisi bo matlafatsoa, ​​​​'me bareki ba fuoa likhetho tse ling tsa limpho ha sephutheloana sa kantle se etselitsoe motho ka mong.

Plastiki ea boleng bo holimo e matla haholoanyane
Plastiki ea maemo a holimo e sebelisoang ho etsa likhalase tsa letsatsi tsa bifocal e ba fa boima bo botle le bophelo bo bolelele. Liforeimi tsa likhalase tsa mahlo tsa polasetiki li phutholohile ebile li tloaelehile ho apara hobane li bobebe ho feta liforeimi tse tloaelehileng tsa tšepe. Likhalase tsa ho bala letsatsi tsa bifocal li tšoarella nako e telele 'me li tšoarella ho feta kaha ntho ea polasetiki e hanela mafome, ho senyeha le ho senyeha.