3D movies project two slightly different images for each eye to create depth perception, which can be problematic for individuals with monovision, as they only see one of the two views. For someone with monovision, watching a 3D film without glasses will not provide the intended experience. However, wearing 3D glasses allows them to view the film alongside others, as the glasses filter the images appropriately. It's noted that the non-stereo version of the film might be edited differently, potentially making it easier for those with non-stereo vision to follow. There may also be some ghosting effects if the filtering isn't perfect, but generally, the polarized glasses work well. Checking the movie's official website could provide additional insights.