Topic: Labile Vertical Heterophoria

Introduction: To perceive the environment, the brain jointly processes a multitude of sensory information provide by sensory modalities (auditory, visual, interoceptive, proprioceptive) and the subject's position in relation to gravitational orientation. Gravitational orientation influences sensory processing (standing compare lying position) and motor control (benefit or against gravity). Influence of gravitational orientation on binocular fusion (cortical mechanisms, role of ocular proprioception, corollary discharge, motor synchronisation of both eyes) was assessed by Perceptive Maddox, whi