Fig. 1
From: Modified superior oblique intrasheath tenectomy in A-pattern with superior oblique overaction
Simplified forced extorsion traction test. a: The left eye is grasped and retroplaced at the 3 and 9 o’clock positions on the limbus. b: The eye is rotated clockwise. In the case of superior oblique overaction (SOOA), the forceps, located at the 3 o’clock position, could not be extorted to the 5 o’clock position before surgery. c: After surgery, eye extorsion of an additional one to one-and-a-half clock hours could be obtained.