Figure 2.

Horizontal OKN trials in normal versus strabismic monkey viewing with the left eye during NW versus TW stimulus motion. In the normal monkey (A, C), horizontal OKN responses were symmetric: slow-phase eye velocity was comparable for NW versus TW stripe motion. In the strabismic 9-week monkey (B, D), OKN was asymmetric: slow-phase eye velocity was robust for NW OKN and weaker for TW OKN. Vertical eye position tracings show upward-directed slow-phase crosstalk, which was minimal in the normal monkey but more pronounced in the strabismic monkey.