Chromatic aberation (CA)
I noticed something strange about my new glasses. They exhibit massive amounts of chromatic aberration. When driving, I can look at the horizon thru the upper part on my glasses and see a very large distinct blue halo on the horizon and around street signs. Tilting my head back I can reach a point where the halo disappears, then tilting my head back even further a red halo appears. This is the first time I have ordered shatterproof lenses and I think chromatic aberration is the reason these lenses were described to me as being "not quite as sharp" as regular lenses. I wonder how many people who complain about "too much CA" are complaining about their own glasses instead of the lens they are evaluating?
I'm a little fuzzy on that.