Inferior rectus muscle transection: a cause of diplopia after non-penetrating orbital trauma.


Vertical diplopia after blow out fracture repair is not uncommon; we report an unusual case of inferior rectus muscle (IR) transection presenting as a persistent infra-duction deficit after uncomplicated blow out fracture repair.


We used multi-positional MRI to diagnose a transected IR with a contracted and posteriorly displaced muscle belly.


Infra-duction improved after surgical repair of the transected IR.


Multipositional MRI is a novel technology that can be used to assist in the decisive management of persistent post-operative infra-duction deficits and avoid prolonged periods of observation.