 Convergence retraction of stagmus are actually psychotic oscillations as well. They are usually seen in conjunction with perinode syndrome, which is a constellation of signs due to dysfunction in the dorsal midbrain region. Light near dissociation, up gaze parisys, and convergence retraction of stagmus are seen. The patient here is looking up, and what you can see are upward, retracting, psychotic pulses. In this example, the patient will be shown looking upwards, and what you will see will be conjugate upward, psychotic pulses. They are easily elicited with a moving OKN target directing the patient's saccades upward. There they can be seen. The patient is being asked to observe a downward moving OKN target, eliciting upward saccades. This side view will allow you to see the retracting movements of the globes. These are occurring while the patient is observing a downward target.