Divergent strabismus following neonatal callosal section is due to a failure of convergence.

Eye alignment was measured in neonatal callosum-sectioned cats that were 1-3 years old. Alignment was measured from photographs of the cat's corneal reflex when alert, anesthetized and paralyzed, and by plotting to optic disc separation during paralysis. The callosal alignment was equally divergent when alert and paralyzed and was identical to the control alignment under paralysis. Therefore, the alert callosal divergence results from a failure to converge the eyes.