Magnetic resonance imaging of strabismus fixus with high myopia before and after surgery

Three cases of convergent strabismus fixus with high myopia were examined by magnetic resonance imaging (MRI) of the orbit before and after strabismus surgery. We paid particular attention to the relation between corrected ocular motility and changes in the lateral rectus muscle. The course of lateral rectus was dislocated downward in two cases, of which the course became normal after surgery. No marked improvement set in the abduction disturbance in these two cases. The abduction disturbance improved postoperatively in the other case which showed no downward deviation of the course of lateral rectus. The findings suggest that improvement in downward deviation of the lateral rectus in strabismus fixus is not necessarily associated with improvement of abduction disturbance.