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1.59 PC Blue Cut Bifocal Invisible Photochromic Grey HMC ruwan tabarau na gani
Kamar yadda sunan ya nuna, madubin bifocal yana da haske guda biyu. Gabaɗaya, ana amfani da shi don ganin nisa, kamar tuƙi da tafiya; Ga yadda haske ke kusa, don ganin kusa, kamar karatu, kunna wayar hannu da sauransu. Lokacin da ruwan tabarau na bifocal ya fito, hakika ana ɗaukarsa a matsayin Bisharar myopia + presbyopia, yana kawar da matsalar yawan ɗaukar hoto da lalacewa, amma kamar yadda mutane ke amfani da shi, an gano cewa ƙarancin ruwan tabarau na bifocal suma suna da yawa.
