Setting bookmarks. Use the bookmarks options to define bookmark levels, create bookmarks from paragraph tags, and set up article threading. 1. In the PDF Setup dialog box, choose Bookmarks from the pop-up menu, or click the Bookmarks tab (Windows/UNIX). 2. Select Generate PDF Bookmarks.
Horizontal Pendular Nystagmus. 1  Lesions of the central tegmental tract (such as due to MS) 2  Spasmus Nutans (can also be vertical, torsional) 3  Nystagmus of the blind.  Congenital nystagmus.
Nystagmus Definition. Nystagmus is an involuntary movement of the eyes, rhythmic, rapid, jerky and changes direction alternately. There are nystagmus corresponding to a normal response of the body in response to external conditions. This is the case when the eyes follow a moving train. The eye follows the movement of the train, to a maximum at the side returns to its original position and follows again a point in the train.