What are bifocal contact lenses?

Like monovision described above, bifocal contact lenses are appreciated by those over the age of 40. These specialized contact lenses include correction for both distance and near in each lens, both left and right. This allows both eyes to be used together for distance and near tasks, often providing better depth perception and more comfortable computer viewing than monovision. Bifocal contact lenses are available in soft or rigid styles.