The debate over active and passive 3DTV glasses has, for the most part, been riddled with biased claims (and more than a little mudslinging) from TV manufacturers on both sides of the aisle. Now, however, an independent study from TCO Development has finally shed some light on how the two glasses can actually affect a user's viewing experience -- and yes, there are some differences. When researchers tilted the passive, film pattern retarder (FPR) above or below a vertical viewing angle of 15-degrees, 3D images tended to bleed into one another at a higher rate. Ac