CP3S said:

You could make them just buy grabbing two pairs of sunglasses and popping and popping the lenses out and making one pair with two right eyes and one pair with two left eyes, right? Or am I over simplifying it?

That's definitely oversimplified. The lenses have to be polarized in a specific way, they're not simple sunglasses. And those 3D-2D glasses wouldn't work everywhere because for example one of the cinemas in my town uses active LCD glasses, (the same technology most 3D TVs use) so these 3D-2D glasses would be useless for that, the only thing that could help is an eye-patch ;-)