Watching 3-D movies generally means suffering through two things: crappy plotlines that favor spectacle over substance and the need to wear some annoying, dorky glasses. Scientists may have solved one of these frustrations. (You might be able to guess which.) Researchers in South Korea have created a new method that would allow moviegoers to simply sit down and start watching a 3-D movie with no extra gear necessary. The research was published Monday in Optics Express. “This is essentially the next step that was required for 3-D display technology without glasses,” said physicist John Koshel.