Avoiding 3-D Movie Headaches

In case any of you are spending your holiday vacations at the theater, lifehacker gives some good advice for moviegoers who get headaches while watching 3-D films:

When watching a 3D movie, whatever is right in front of you and in-focus is what you want to be paying attention to—focusing on the background details for too long triggers headaches and disorientation.

According to the lifehacker article, because of 2-D movies, we're conditioned to constantly scan the movie screen, even looking at the parts of the image that aren't in focus (especially during action movies-- what's lurking in the background?). 3-D movies weren't made to be watched that way, so as long as you watch on what's in the foreground (whatever is in-focus), you should be fine. :)