infraversion
Infraversion is a conjugate movement of both eyes downward, the version that takes the eyes into downgaze. A version is a binocular eye movement in which both eyes move in the same direction.1 The same movement is also called deorsumversion.2
Two depressors in each eye produce infraversion. The inferior rectus and the superior oblique both depress the eye, so they act as synergists in downgaze.3 The two muscles are antagonists in torsion, because the superior oblique incyclorotates the eye and the inferior rectus excyclorotates it.3 The pair of depressors in one eye is yoked as a unit to the pair of depressors in the fellow eye.3
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Reviewed October 2026