Absolutely awful and a waste of money. Using a factory made anaglyph DVD, I compared these plastic lenses and "cardboard" style glasses. The cardboard style won. The cardboard style produces a much higher quality 3D image with virtually no ghosting. I thought these plastic lenses were even better than disposable lenses, but they're actually worse. Not only do you get a lot of ghosting with these plastic lenses, but they give you a headache almost immediately the moment you put them on. The cardboard glasses I used in the test didn't give me any headaches or nausea at all. I also did a test comparing these glasses with plastic lenses and cardboard style after converting the clip with several 3D conversion programs (2D to 3D) and the cardboard style still works much better. It's just a pity that the cardboard frames aren't as strong and don't offer a wider field of view. But I accept that in order to get a really good, pin-sharp 3D image.
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