Abstract: Objective To compare the effect of different training methods on ocular alignment and stereoacuity reconstruction for postoperative patients with concomitant strabismus. Design Prospective randomized controlled study. Participants 213 patients with concomitant strabismus who underwent strabismus surgery in Beijing Tongren Eye Center. Methods All patients were randomly divided into three groups: observation group, traditional binocular vision training group and visual perception training group. The patients were followed up at 1st week,  3rd and 6th month after operation. The ocular alignment and stereoacuity were examined. Main Outcome Measures Deviation degree, perceptual deviation degree, eye position distortion, recurrence rate, stereoacuity. Results At 6th month, the rate of normal ocular alignment for observation group, traditional binocular vision training group and visual perception training group was respectively 78.46%、86.84%、91.67%. The rate of the visual perception training group was significantly higher than that of the observation group (χ2=4.78, P=0.03). The deviation degrees of three groups at 6th month were significantly higher than 1st week（Ffar=676.69, Fnear=794.65, both P=0.000）. The perceptual deviation degree of visual perception group at 3rd and 6th month was significantly lower than 1st week（F=98.34, P=0.000）, which was not significantly different at different times for other two groups. The eye position distortion of visual perception group and traditional training group at 6th month was significantly lower than 1st week（F=90.37, P=0.000）, which was not significantly different for observation group at different times. The distant stereoacuity was improved in the observation group and traditional binocular vision training group at 3rd and 6th month contrast with 1st, 3rd and 6th month in the visual perception group (F=86.70, P=0.000). The near stereoacuity of traditional training group and visual perception group was improved at all follow-up times（F=25.90, P=0.000) and no significant difference was obversed in the observation group. Conclusion The near stereoacuity can be reconstructed better in the traditional binocular vision training group and visual perception training group after operation. The distant stereoacuity can be better reconstructed in visual perception group which might be related to its more stable eye position control.

Key words: concomitant srabismus, ocular alignment, stereo acuity, visual perception