Distinguishing a blended bifocal from a progressive

The most common mistake multifocal wears make is mixing up a blended bifocal lens to a progressive lens. A blended bifocal lens is blended, there is no visible line from the distance and near, and only offers vision for dstance and near. Now a progressive lens on the other hand also is blended, but the main difference is that it also offers the intermediate vision. More like a tri-focal lens, but offering a smooth seemless blend with no lines at all. So the next time you plan to order a multifocal lens, you always want to have an idea of exactly what you want to order before spending money on something you really didn't ask for.