I believe, to many people, bifocal eyeglasses must be an unfamiliar name. Maybe glasses wearers know something about this new kind of eyeglasses. Bifocal eyeglasses play an indispensable role in the daily life of those people who are both troubled with near-sighted and far-sighted problems. To them, a single pair of traditional eyeglasses can not totally solve their problems. (more…)