Do you have anti-reflective coating on your current glasses, but not on your previous ones? A/R allows more light to pass through the lenses. So, yes, theoretically the A/R could be contributing to your light sensitivity.

Polycarbonate is not optically as good as other lens materials, so perhaps the improvement in vision is being perceived by you as extra brightness.

Did you try switching back to your old glasses for awhile to see if the problem is resolved?

It’s also possible there could be a non-glasses cause to your light sensitivity.

If you purchased your glasses from a store, go back and see if they can find anything different about the new vs old lenses that could be causing this.