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1.59 PC Blue cut Bifocal Invisible Photochromic Gray HMC lens Optical
Njengoba igama liphakamisa, isibuko se-bifocal sinokukhanya okubili. Ngokuvamile, isetshenziselwa ukubona ibanga, njengokushayela nokuhamba ngezinyawo; Okulandelayo ukubona ukukhanya okuseduze, ukubona okuseduze, njengokufunda, ukudlala umakhalekhukhwini nokunye. Lapho i-bifocal lens isanda kuphuma, ngempela yayibhekwa njengeVangeli le-myopia + presbyopia, eqeda inkathazo yokukhetha nokugqoka njalo, kodwa njengoba abantu besebenzisa, kutholakala ukuthi ukushiyeka kwe-bifocal lens nakho kunabaningi.
