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Oculomotor disorders and impaired binocular vision account for a substantial proportion of childhood eye conditions. We proposed chronaximetric electrodiagnostics to assess the functional status of the extraocular muscles. The method evaluates muscle electrical excitability by determining the frequency, modulation depth and amplitude of sinusoidally modulated current. It was the principal method used in the treatment of concomitant strabismus. Chronaximetric electrodiagnostics showed that, in most children with oculomotor disorders, the modulation frequency was reduced to 30-50 Hz at a current amplitude of 16.5 ± 0.06 mA. Combined pleoptic-orthoptic treatment and electrical stimulation restored oculomotor function and doubled treatment effectiveness.