glasses or a 3-D compatible TV. This is not true. I've used stereogram pictures for a long time, view this youtube tutorial on how to view the game in 3d.
It may take some time getting used to, but eventually, you'll learn how to focus instantly, I actually find it harder to lose focus.
http://www.youtube.com/watch?v=zBa-bCxsZDk&feature=fvwrel