== WARNING:  Much is Backwards! == 

 Do not reverse images when making stero pairs. 

 Much of the information on this page is completely wrong.  The description of crosseyed viewing actually requires a form of walleye diversion that exceeds the parallel limit at infinity.  They eye does not want to do this.  The descriptions calling for reversal of stereoscopic images for open eye use are wrong. 

 Crossing the eyes fuses the images, not reverses them.  Therefore, they didn't need to be swapped in the first place.  People get themselves worked up by the word "cross", needlessly. 

 The reason stereoscopes exist is not to swap the images, but to allow them to be brought close to the eye, as they can then be much larger and would overlap.  Stereoscopes deal with overlap, not swap. 

 This is the cause of a number of complaints people have in multiple sections below.  Patients can even confuse their optometrists, because the optometrists assume the stereo images that their patients saw at home are placed correctly.  People with Ph.D.s and major science sites get this wrong nearly all the time when making stereo pairs. 

 Worse, most of the websites on Teh Internets are wrong, because they copied off of each other.  Some even have mixed types of test images, and do not mention this. 

 Be careful before refuting this:  Your eyes use many different types of cues to create fusion, and can partially fuse a number of features, although the overall picture will have at least some problems.  Try manually putting the images in the same locations that the eyes would have seen them, like a stereoscope does, and it will work great.  Look at the old-time (unswapped) picture on the article page of two women, and it fuses great. 

 Please get it straight.