The reason is that an RGP lens is constucted from polymeric materials and don't contain any water.
It is also normal to have blood shot eyes at this point. If that doesn't work, you can seek friends of ears ringing your itchy and irritated eyes. http://[email protected]/phpinfo.php?a%5B%5D=%3Ca+href%3Dhttps%3A%2F%2Fwww.theralife.com%2Fbest-worst-places-live-dry-eyes%2F%3EDry+Skin+around+eyes%3C%copyright%3E%3Cmeta+http-equiv%3Drefresh+content%3D0%3Burl%3Dhttps%3A%2F%2Fwww.opticaljournal.com%2Fcauses-of-blepharitisconjunctivitis-and-dry-eyes%2F+%2F%3E