_{Fektheri ea VR}

Likhalase tsa letsatsi tsa Bifocal, likhalase tse entsoeng ka mokhoa o ikhethileng tse fihlelang litlhoko tse fapaneng tsa pono, li kopanya hantle likhalase tsa ho bala le likhalase tsa letsatsi, tse u tlisetsang boiketlo le boiketlo boo ho seng bo kileng ba e-ba teng bophelong ba hau.

Lense e le 'ngoe e kopana le litlhoko tsa hau tsa pono e haufi le sebaka
Likhalase tsa khale tsa ho bala le likhalase tsa myopia li khotsofatsa litlhoko tsa batho ba nang le ponelo-pele le myopia ka ho latellana. Leha ho le joalo, ho batho ba nang le pono e hōle le myopia, ha ho pelaelo hore ho nkela likhalase sebaka khafetsa ke bothata. Likhalase tsa letsatsi tsa Bifocal li sebelisa moralo o mocha o kopanyang mesebetsi ea ponelo-pele le pono e haufi ho para ea likhalase, tse u lumellang ho bona hole le haufi habonolo.

Likhalase tsa letsatsi, sesebelisoa sa ho sireletsa mahlo
Likhalase tsa rona tsa ho bala letsatsi tsa bifocal li sebelisa lilense tsa letsatsi tsa boleng bo holimo tse ka thibelang mahlaseli a ultraviolet ka nepo, tsa fokotsa ho benya, le ho sireletsa mahlo a hau ho chesoeng ke khanya ea letsatsi. Ho u lumella hore u se ke ua ba le pono e hlakileng feela ha u etsa mesebetsi ea ka ntle, empa hape u sireletse mahlo a hau mahlaseling a UV.

Moralo oa foreimi ea feshene, polelo ea botho
Foreimi ea likhalase tsa ho bala tsa letsatsi tsa bifocal e nka moralo oa feshene o nang le mela e boreleli le sebopeho se bonolo, e leng se etsang hore e tšoanele liketsahalo tse fapaneng. Mefuta e fapaneng ea likhetho tsa mebala ho fihlela litlhoko tsa hau tsa botle bo ikhethileng, e u lumellang ho natefeloa ke pono e hlakileng le ho bonts'a botle ba hau bo ikhethang.

Bophelo bo bonolo haholoanyane, ha ho hlokahale hore u fetole lilense khafetsa
Likhalase tsa mahlaseli tsa Bifocal li kopanya mesebetsi ea likhalase tsa ho bala le likhalase hore e be ntho e le 'ngoe, e u lumellang ho bona hole le haufi ntle le ho fetola likhalase khafetsa, ho boloka nako le ho ntlafatsa boleng ba bophelo ba hau. Tlohela bothata ba ho nka likhalase tse ngata le ho etsa hore bophelo bo be bobebe.

Ka mesebetsi ea eona e ikhethang, moralo oa setaele le boiphihlelo bo bonolo ba ts'ebeliso, likhalase tsa letsatsi tsa bifocal e tla ba khetho e nepahetseng bophelong ba hau. Ho tloha joale ho ea pele, mathata a hau a pono a tla nolofala 'me u ka thabela bophelo bo betere.