A bifocal lens has a line demarcating the far vision optics from the near reading optics. A progressive lens has no line and has optics for all distances of vision, far vision, intermediate vision and near reading distance. There are many different progressive designs on the market, some better than others. Newer digital progressives have wider intermediate and reading optics than older standard progressives. There are also computer progressives that offer better ergonomics and optics for computer and reading reducing eye strain along with neck and shoulder pain.