"No-Dtm" GlassesThese patented glasses will convert Real D 3D programming to 2D at the theatre. This is useful if a studio has done a particularly bad conversion of 2D into 3D (i.e. Clash of the Titans) or due to an eye disorder or another reason you cannot view 3D. It will allow someone who does not enjoy 3D to watch a movie with people who are watching a 3D movie.