Some people cannot adjust to the progressives... at first you may feel something that feels like motion sickness. The thing I like about them is that there is usually someplace on the lens that you can find to focus at any distance. With the regular bifocals, if you can't see out of the top lens and you can't see out of the bottom lens, there's no in-between. With the progressives, there is an in-between. This is handy for shopping and especially browsing bookstores and grocery stores where you can't easily adjust your distance from the object you're trying to see. You just move your head up and down until you find a place on the lens that focuses.
