And on a serious note, if you have severe eyesight problems, I'd advise a long trial of 3D before spending the money, as some users find their eyesight means they just don't 'get' 3D.
For example my wife, who is unfeasibly shortsighted (and I'll point out that's the only reason she married me before anyone else does!) finds that even with her glasses on she struggles to get the 3D image to work.