What type of deflection is observed on the REOG tracing when looking toward the REOG?

When looking toward the REOG (right electrooculogram), a positive deflection is observed on the tracing. The REOG measures the potential difference between the cornea and the retina, which is influenced by the position of the eyes.

When the gaze shifts to the right, the cornea moves toward the right electrode (the one placed on the right side of the eye), resulting in a more positive charge detected by that electrode. This generates a positive deflection on the tracing due to the directional change of the electric field created by the movement of the eyes.

It's crucial to understand that as the eye moves in that direction, the electrical potential increases at the respective electrode, and thus the tracing reflects this increase as a positive (downward) deflection on the REOG output. This physiological response is consistent with the expected behavior of the electrooculogram in relation to eye movements.