Actually Jessice, it is a fact that for some people, the rigid gas permeable contacts do slow the nystagmus. This is only true for the hard contacts, not soft ones. It is also not a guaranteed result of wearing the RGP contacts, but it has been documented enough to be mentioned in some of the professional articles. I believe it has to do with the weight of the contacts on the eye, however that I cannot state for a fact. If you are one of the lucky ones that the RGP contacts slows the nystagmus as well as corrrects your refractive errors, it is like a free bonus!! For the most part, if you are going to try contacts anyways, who knows--you might just get lucky.
Joni