So it is due to the polycarbonate lenses versus having glass lenses. That sounds reasonable.It's very possible especially if they have polycarbonate lenses. When I used my glasses with poly lenses for the first time I noticed CA looking up at a telephone pole (no binocular). A bird landed on top and I looked up and saw CA on the side of the pole. This was coming out of the eye place wearing my new glasses. Plus the bino has to be aligned properly with your eyes while wearing the glasses or you'll see considerable amounts of CA (from my experience).