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1.56 Amalensi akhanyayo ampunga Semi Finished Bifocal
Ngokuvamile, izibuko ze-myopia ezishintsha umbala azikwazi nje ukuletha ukunethezeka nobuhle kodwa futhi zingamelana ngokuphumelelayo ne-ultraviolet kanye ne-glare, zingavikela amehlo, isizathu sokushintsha umbala ukuthi uma i-lens yenziwa, ixubene nezinto ezizwela ukukhanya. , njengesiliva chloride, i-silver halide (eyaziwa ngokuthi i-silver halide), kanye nenani elincane le-copper oxide catalyst. Noma nini lapho i-halide eyisiliva ikhanyiswa ukukhanya okunamandla, ukukhanya kuzobola futhi kube izinhlayiya eziningi zesiliva ezimnyama ezisatshalaliswe ngokulinganayo kulensi. Ngakho-ke, i-lens izovela ifiphele futhi ivimbele ukudlula kokukhanya. Ngalesi sikhathi, i-lens izoba nombala, okungavimbela kahle ukukhanya ukufeza injongo yokuvikela amehlo.
