That perhaps explains why I initally didn't like my current pair as much as my old ones, Spaw. I thought it was because my new ones had a smaller glass area in which to compress the various magnifications. I was surprised that although they were the same prescription, I had to get used to them all over again, as if I had never worn progressives before. Think I will get my old ones repaired again, so that I at least have some back up.