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Flat-top/Round-top Bifocal Lens
Magalasi a Bifocal amatha kutchedwa mandala ambiri.Ili ndi magawo awiri a masomphenya mu lens imodzi yowoneka.Lens yayikulu nthawi zambiri imakhala ndi malangizo ofunikira kuti muwone patali.Komabe, izi zitha kukhalanso mawu anu oti mugwiritse ntchito pakompyuta kapena zapakati, chifukwa nthawi zambiri mumayang'ana molunjika mukamawona gawo ili la lens. Mbali yapansi, yomwe imatchedwanso zenera, nthawi zambiri imakhala ndi malangizo anu owerengera.Popeza nthawi zambiri mumayang'ana pansi kuti muwerenge, ...