I’ve posted previously on this topic here and here, the latter a personal experience. Now, R. Colin Johnson reports on recent research at UC Berkeley that provides some guidance to videographers and cinematographers who are shooting in 3D. He writes:
… According to [professor Martin] Banks, when viewers direct their eyes at nearby objects or scenes, their gaze converges. When they gaze into the distance they, diverge, or what optometrists call "vergence." Conversely, focusing the eye muscles to bring something into sharp focus is called "accommodation." ¶ In the real world, vergence and accommodation are synched to the same distance, but in the world of 3-D stereoscopic glasses decouple the two, forcing the brain to cope with a disparity between the vergence and accommodation distances. …
Link: EE Times.
Also see this piece by Junko Yoshida, Opinion: 3-D TV can’t make your kids sick…can it? Link: EE Times. --Dennis