Some people may have severe eye problems, they may be both far-sighted and short-sighted, now the multi-focal prescription eyeglasses is just what they need. The multifocal lenses can be divided into three types: bifocal lenses, progressive lenses, and trifocal lenses. The multi-focal prescription eyeglasses can change according to different situations, with it even you are a people who have severe eye problems, you won’t be worried about your vision problems any more.