1. Why do I need to wear glasses, and why are they so expensive?
The 3 dimensional effect is created by two separate images that need to be put together. The glasses help us do that. If you’ve ever been to a 3D movie, it’s basically the same at home.
The price difference has to do with the fact that different manufacturers use different technology. The two main ones are active shutter-type glasses and the Film Patterned Retarder-type (FPR) glasses. Active shutter-types require batteries to receive images from the TV, and the left and right lenses have to turn on and off at a very high rate. These can cost as much as $200.