http://dwi.austindefense.com/2006/09/articles/field-sobriety-tests/horizontal-gaze-nystagmus-hgn/nystagmus-resulting-from-pathological-disorders-nhtsa-manual-2006/ Nystagmus can be caused by certain pathological disorders. They include brain tumors and other brain damage or some diseases of the inner ear. These pathological disorders occur in very few people and in even fewer drivers.... en-us Copyright 2008 Wed, 09 Jul 2008 19:06:24 -0600 http://www.movabletype.org/?v=3.34 http://blogs.law.harvard.edu/tech/rss