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I-Flat-top/Round-top Bifocal Lens
Ilensi ye-Bifocal ingabizwa ngokuthi ilensi enezinjongo eziningi.Inezinkambu ezi-2 ezihlukene zokubona kulensi eyodwa ebonakalayo.Ilensi enkulu ivamise ukuba nencwadi kadokotela edingekayo ukuze uyibonele ibanga.Kodwa-ke, lokhu kungaba futhi incwadi yakho kadokotela yokusetshenziswa kwekhompuyutha noma ibanga eliphakathi nendawo, njengoba ngokuvamile ubuzobheka uqonde lapho ubuka le ngxenye ethile yelensi.Ingxenye engezansi, ebizwa nangokuthi iwindi, ngokuvamile inencwadi yakho kadokotela yokufunda.Njengoba ujwayele ukubukela phansi ukufunda,...