Multifocal IOLs contain more than one focusing power within each lens (similar to bifocal glasses but without any line or ...
If folks previously needed distance vision correction, progressive lenses allow them to have both prescriptions without needing multiple glasses. Unlike bifocal lenses, progressive lenses have no ...
Benjamin Franklin is credited with inventing the first bifocal eyeglasses in 1785 for his own use as he reportedly detested readers. In advanced countries, reading glasses and bifocal or trifocal ...