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  • 1.59 PC Bifocal Invisible Photochromic Grey HMC ruwan tabarau na gani

    1.59 PC Bifocal Invisible Photochromic Grey HMC ruwan tabarau na gani

    A halin yanzu, akwai nau'ikan nau'ikan nau'ikan ruwan tabarau a kasuwa, ɗayan kayan gilashi ne, ɗayan kayan guduro ne. An raba kayan guduro zuwa CR-39 da polycarbonate (kayan PC).

    Bifocal lenses ko bifocal lenses su ne ruwan tabarau waɗanda ke ɗauke da wuraren gyara guda biyu a lokaci guda kuma ana amfani da su don gyara presbyopia. Wuri mai nisa da ruwan tabarau na bifocal ya gyara ana kiransa da nisa, kuma yankin kusa ana kiransa kusa da wurin karatu. Yawanci, yanki mai nisa yana da girma, don haka ana kiransa babban fim, kuma yankin da ke kusa da shi kadan ne, don haka ana kiran shi sub-fim.