Deviation in head posture intended to mitigate the visual challenges of diplopia and nystagmus, mostly caused by an incomitant strabismus. The head position is adjusted to increase the separation between the diplopic images to achieve fusion. For instance, if the right medial rectus or the left lateral rectus is affected, the head is turned left. For nystagmus, the patient’s compensatory head posture aims to put the eyes in the null position.