Figure 1. Horizontal eye position before and after alcohol consumption.

Horizontal eye position recorded in a single trial from a typical subject before (A, C) and after alcohol consumption (B, D). Positive angles correspond to right gaze eccentricities as seen by the subject. In A and B, right eye position is plotted as a function of time. Insets (a–d): centrifugal nystagmus is already present at the same gaze eccentricity, but slow phase velocity of nystagmus is strongly increased by alcohol consumption. In C and D, horizontal eye‐drift velocity is plotted against gaze position. Data points: instantaneous velocities of slow phases; saccades were removed during preprocessing of data. Solid bars: median (MAD) of instantaneous eye‐drift velocity. Greater gaze instability is caused by alcohol intake. Such an effect is visible as a homogenous increase of eye‐drift for all gaze angles (D) compared to the baseline condition (C).