If you are not nearsighted and farsighted but only Presbyopia because of age.  This is the place for you. 

In this situation, Actually you do not need prescription progressive glasses. The standard progressive glasses are enough for you. Much fast and less expensive.

The Upper portions of your lenses are clear. As you lower your eyes, the magnification increases gradually allowing you to see better at different close up distances.

The lens looks like a single vision lens and does not see the dividing line of the degree change.
Not only is it beautiful, but more importantly it protects the wearer's age privacy (for reading glasses wearers), and there is no need to worry about leaking the age secret by wearing a mirror.