-
1.56 Semi Finished Bifocal Photo imvi optical lens
Kawirikawiri, magalasi a myopia osintha mitundu samangobweretsa kukongola komanso kukongola kokha komanso amatha kukana kuwala kwa ultraviolet ndi kuwala, amatha kuteteza maso, chifukwa cha kusintha kwa mitundu ndichakuti lenzi ikapangidwa, imasakanizidwa ndi zinthu zomwe zimakhudzidwa ndi kuwala, monga siliva chloride, silver halide (yomwe imadziwika kuti silver halide), ndi copper oxide catalyst yochepa. Nthawi iliyonse silver halide ikawunikiridwa ndi kuwala kwamphamvu, kuwalako kumawola ndikukhala tinthu tambiri takuda ta siliva tomwe timagawidwa mofanana mu lenzi. Chifukwa chake, lenziyo idzawoneka yofooka ndikutseka njira ya kuwala. Panthawiyi, lenziyo idzakhala yamtundu, zomwe zingalepheretse kuwala kukwaniritsa cholinga choteteza maso.
