I just ran across these on Amazon, and think they’re a terrific idea. I really dislike the new wave of 3D movies. The things give me a headache for very little benefit. These glasses purport to convert the 3D back to regular old 2D.
The 3D effect in movies is created by showing two different images on the screen at the same time. Regular 3D glasses block one of the images from coming in one lens, and the other image from coming in the second lens. The 2D glasses are designed so that both lenses block the same image.
It doesn’t, however, work in iMax theatres.