AIM:To explore the operative opportunity and postoperative effects in patients with partially accommodative esotropia.

METHODS: Three stages of the binocular visual function and VEP were observed in different ages with 65 cases of partially accommodative esotropia in preoperatively and postoperatively.

RESULTS: The difference in binocular visual function between preoperatively and postoperatively was significant(Z=7.253, P=0.000). The difference in binocular visual function with the difference age of operation was significant(H=6.739, P=0.034). The postoperation latencies were shortened and amplitude values were higher than preoperation(P_latency=0.029, P_amplitude=0.037).

CONCLUSION: The binocular visual function was improved after surgery. The early correction of eye position will benefit to the binocular visual function.