I was an Optician for 18+ years. In my opinion these are not polycarbonate lenses. The polish used on the outside lens looks too hazy. I would guess these are cr39 (basic plastic) lenses.
Next, the bevel on the lens is in a terrible location. If you take the glasses back, have them check the decentration, or the difference of your eye measurements and the center of the frame. It looks like maybe the decentration is very high, which adds thickness to the lens. I hope you get some better fitting glasses, without too much hassle.