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Volume 50, 2000, p. 8588

Change in the Primary Position Deviation in Small Angle Esotropias with Dissociated Vertical Deviations after Large Bilateral Symmetric Recessions of the Superior Recti (Abstract)
Lesley Farrell Gonzdlez, M.D., Maria Estela Arroyo Yllanes, M.D., Jose Fernando Perez Perez, M.D.

Introduction and Objective:
A prospective and longitudinal study was done in order to evaluate the change in the deviation in primary position in patients with small angle esotropia after symmetrical retroequatorial recession of the superior recti.

Eight patients with congenital esotropia equal or less than 16 PD and Dissociated Vertical Deviations are included. A 10 12mm symmetric recession of the superior recti was done. The amount of esotropia present in the primary position preoperatively was compared with the postoperative measurement. The minimum follow up was six months.

The mean preoperative esotropia was 12A ( +/ 4.7), and changed to 5.6 PD (±3.2) at the immediate postoperative examination and to 6.4 PD(±1.9) at the last follow up. The analysis showed a drift to exotropia in the immediate postoperative evaluation (P=0.01) and a non significant change during the follow up period. (P=0.6)

The large and symmetric recession of superior recti diminished the amount of esotropia in the primary position by an average of 8PD.