It totally could be! For years I just thought it was me and I was doing something wrong, but a year or two ago, I saw a new optometrist and they did a 3-D test and I pretty much failed. The optometrist said some people just can't see in 3-D (or can't see well in 3-D. I have to say, it totally made me feel better (and also explained why I've never thought 3-D movies were all that! heh).