Neurological aspects of vergence eye movements.

This review of vergence eye movements emphasizes the importance of performing a more rigorous examination of vergence at the bedside. Furthermore, recent experimental studies have better defined the physiological organization of brain-stem neurons that generate immediate premotor vergence commands. We emphasize analogies with the saccadic system and suggest that there are common organizational features of models for the generation of saccadic and of vergence movements. Finally, using the paradigm of spectacle-corrected anisometropia, we have demonstrated a remarkable adaptive capability that assures proper ocular alignment with changes of gaze.