Magalasi a magalasi a Bifocal ali ndi mphamvu ziwiri zokuthandizani kuwona zinthu patali mukataya mwayi wosintha kuyang'ana kwa maso anu chifukwa cha ukalamba, womwe umadziwikanso kuti presbyopia.
Chifukwa cha ntchito yeniyeniyi, ma lens a bifocal nthawi zambiri amaperekedwa kwa anthu opitirira zaka 40 kuti athandize kubwezera kuwonongeka kwa maso chifukwa cha ukalamba.
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Maola a 7.5 ndi nthawi yowonera tsiku ndi tsiku yomwe timagwiritsa ntchito pazowonera zathu. M’pofunika kuti tiziteteza maso athu. Simungatuluke tsiku lachilimwe lotentha popanda magalasi, ndiye bwanji osateteza maso anu ku kuwala kumene chophimba chanu chimatulutsa?
Kuwala kwa buluu kumadziwika kuti kumayambitsa "Digital Eye Strain" yomwe imaphatikizapo: maso owuma, mutu, kusawona bwino, komanso kusokoneza kugona kwanu. Ngakhale ngati simukumana nazo izi, maso anu amakhudzidwabe ndi kuwala kwa buluu.
Magalasi a buluu otchinga ma bifocal ali ndi mphamvu ziwiri zosiyana za mankhwala mu lens imodzi, zomwe zimapatsa iwo omwe amawavala ubwino wa magalasi awiri a magalasi amodzi. Ma Bifocals amapereka mwayi chifukwa simuyeneranso kunyamula magalasi awiri.
Nthawi zambiri nthawi yosinthira ndiyofunikira kwa ambiri ovala ma bifocal atsopano chifukwa chamankhwala awiri omwe ali mu lens imodzi. M'kupita kwa nthawi, maso anu adzaphunzira kuyenda molimbika pakati pa mankhwala awiriwa pamene mukuyenda kuchokera kuntchito ina kupita ina. Njira yabwino yochitira izi mwachangu ndi kuvala magalasi owerengera atsopano a bifocal pafupipafupi momwe mungathere, kuti maso anu azolowere.