Yeah, you are right. We have to be sure that our 3d glasses are working when you are watching 3d movies, because you know without the 3d glasses, the images will not pop or be three dimensional. Here and now I will tell you some way to tell whether your 3d glasses are working. First of all, you can wear your 3d glasses for a few minutes to make sure whether the images in the movies pop out towards you. Namely, if the 3d glasses are the right and correct kind, you will notice the details pf depth and floats as you see. If not, then your 3d glasses are not working. Secondly, you can cover one of your eyes to see the movies, if the glasses are working, the eyes being covered will destroy the sense of depth and float. If not, you should ask for help from the worker in the film. Hope my personal advice can help you solve the problem.
