Acute acquired concomitant esotropia with congenital paralytic strabismus: A case report

Figure 1 Preoperative nine-gaze image. A: Normal eye movement in gaze up-and-right; B: Normal eye movement in upgaze; C: Overaction of the inferior oblique muscle in the right eye; D: Normal eye movement in right gaze; E: Esotropia of the right eye in the primary position; F: Overaction of the inferior oblique muscle in the right eye; G: Normal eye movement in gaze down-and-right; H: Normal eye movement in downgaze; I: Underaction of the superior oblique muscle in the right eye.