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Magalasi a 1.56 Blue Cut Photochromic Gray HMC Optical
Lenzi ndi chinthu chowonekera bwino chokhala ndi malo amodzi kapena angapo opindika opangidwa ndi zinthu zowala monga galasi kapena utomoni. Pambuyo popukuta, nthawi zambiri amasonkhanitsidwa m'magalasi okhala ndi chimango chagalasi kuti akonze masomphenya a wogwiritsa ntchito ndikupeza malo owoneka bwino.
Kukhuthala kwa lenzi kumadalira kwambiri refractive index ndi digiri ya lenzi. Ma lenzi a myopic ndi opyapyala pakati komanso okhuthala m'mbali, pomwe ma lenzi a hyperopic ndi osiyana. Nthawi zambiri digiri ikakhala yayikulu, lenzi imakhala yokhuthala; refractive index ikakwera, lenzi imakhala yopyapyala.
