Inheritance of Duane's syndrome.

Also, evidence for "formes frustes" of Duanes' syndrome in other family members in the forni of pareses of oculomotor muscles other than the lateral rectus or of slight narrowing of the palpebral fissure on adduction, has been reported by FranSois and de Vos (I958) and by Orlowski, Krych, and MIichniowska-Leonowicz (I96I). Most of the above observations have been confined to single sibships, or to two and occasionally three generations. Duane's syndrome has occurred as an isolated phenomenon in each of these reports, apart from those of Mein (I968) and Kirkham (i 969a) where perceptive deafness was a feature, and Waardenburg (i 963) where the Klippel-Feil anomaly was seen in a girl and in her paternal aunt.