Why have 3D movies changed from needing blue/red lenses to clear glasses?

Question

I remember as a kid when I went to a 3D movie and you would have to wear those glasses with one blue eye and one red. Then a couple years later, you don’t need those red/blue glasses but these clear ones. And now you don’t need glasses at all.

Why is that?

In: 9

Answer 1

There are better ways now of feeding the appropriate image to separate eyes than red/blue lenses and thus can preserve colour in the images. One uses up/down versus left/right polarization. Another, suited to digital media, is to synch rapidly alternating images on the screen with lenses that alternate which one blocks or transmits.