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Abstract
A retrospective study of 892 patients investigates the occurrence of preoperative and postoperative diplopia in adult strabismus. The original etiology of strabismus was esotropia in 264 patients, exotropia in 214 patients, paretic strabismus in 270 patients, restrictive strabismus in 87 patients, and miscellaneous strabismus in 57 patients. Forty-seven percent of the patients had preoperative diplopia while 41% of the patients had no diplopia preoperatively. Of the patients with preoperative diplopia, 74% had no postoperative diplopia, 12% required small amounts of prism to correct their diplopia, 5% eliminated diplopia with an abnormal head position, 3% were unknown and 2% ignored their diplopia. Three percent of the patients with preoperative diplopia were still diplopic following surgery.
Overall, diplopia at some time in the postoperative period was found to be common. Thirty-nine percent of the patients had diplopia at 6 weeks postoperatively, however, only 18 patients (or 2% of the population) had diplopia at the last postoperative visit. Five patients (1.4%) who did not have diplopia preoperatively, had diplopia at their last postoperative visit. The most common reason for this was an overcorrected deviation.