Abstract
Summary A posterior fixation suture has two functions. It decreases the action of an extraocular muscle in its field of primary action without producing over or under effects in other positions of gaze, and it increases the innervation of the contralateral yoke muscle. Firm indications for its use still have to be determined, but it has been found beneficial in selected cases with dissociated vertical deviation, double elevator paralysis and the nystagmus blockage syndrome. The appropriate rectus muscle is fixed to the sclera with nonabsorbable sutures behind the equator of the globe. Details of technique, and some complications, are presented.
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