Improvement of ocular movement after the repair of a
fracture of the orbital floor is generally confirmed by the
forced duction test. However, such improvement is more
difficult to assess after the endoscopic transantral approach
without direct visualisation of soft tissues above the orbital
floor, because the assessment depends on the surgeon’s skill
and experience and there are few objective indicators. We
report the use of a dial tension gauge to assess quantitatively
the intraoperative improvement of ocular movement
after endoscopic transantral repair of a fracture of the orbital
floor.