Timaonetsetsa kuti zinthu zonse zomalizidwa ndi zapamwamba kwambiri kwa makasitomala athu ndipo timapereka ntchito yathunthu, yoganizira pambuyo pogulitsa.
Magalasi owerengera adapangidwa kuti azithandizira kuthana ndi vuto linalake lachipatala, lotchedwa presbyopia, zomwe zimachitika mwachilengedwe m'maso mwanu mukamakalamba.
Presbyopia ndi chikhalidwe cha maso nthawi zonse chomwe chimagwirizanitsidwa ndi ukalamba kumene lens ya diso imataya mphamvu ndipo motero imataya mphamvu yoyang'ana zinthu zomwe zili pafupi.Monga tanenera, presbyopia nthawi zonse imagwirizanitsidwa ndi ukalamba, koma imatha kuchitika kwa anthu azaka zonse, ndipo pali okalamba omwe sakhudzidwa.Magalasi owerengera amapangitsa zinthu kukhala zazikulu, zomwe zimapangitsa kuti maso anu aziyang'ana mosavuta.
Ngati simukufuna magalasi anu owerengera kuti muwerenge, magalasi owerengera atha kukhala njira yabwino yowonjezerera mafelemu anu azachipatala musanadumphire ku ma bifocals.
Ngati muli ndi kale mankhwala a lens omwe mumavala powerenga, tikukulimbikitsani kuti mupitirize kutero.Mosiyana ndi magalasi owerengera, omwe amapangidwa kuti athetse mavuto omwe amayamba chifukwa cha presbyopia, magalasi olembera angathandize kuthana ndi zovuta zosiyanasiyana.
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