Abnormal ocular head postures: Part IV.

All patients exhibiting the various types of abnormal head postures of ocular origin that were seen during the last two years are presented in order to determine the relative frequency of the different causes of these postures, and the purposes they serve. The treatment modality and results are also discussed. This manuscript is divided into four parts: Parts I, II, and III concern head postures in incomitant strabismus. In Part IV, head postures in Ciancia's syndrome, restrictions, and refractive errors are described.