I can understand your thinking regarding Progressive vs bifocal but.. progressive lenses are bifocal and not unusual or rare. Most optometrists recommend a progressive trial for new patients that are experiencing bifocals for the first time. The missing bifocal line is more pleasing to people worried about their appearance. With both types of lenses, there is a learning curve. It takes time for the brain to adjust to the different focal lengths of each. My brother and wife have both tried the progressive lenses and were not happy with the transition vision. I've had progressive for about 6 years and could not tell you where the focal lengths change. My vision is clear from a distance of 20+ feet to within 9". Progressive lenses aren't for everyone but they do work for me.