Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Eye movement record showing horizontal and vertical traces of the right (R) and left (L) eyes with the Ober-2 system. Patient no 2 with only horizontal traces shown. The record showing a jerk nystagmus with a SPI (slow phase exponentially increasing velocity) waveform with a superimposed foveating saccade (arrow). Horizontal bar, 2 degrees; vertical bar, 200 ms.
