AIM:To investigate binocular visual function changes and the rules of clinical changes in early stage of patients with congenital paralytic strabismus, concomitant exotropia and concomitant esotropia before and after strabismus surgery.

METHODS:Totally 106 cases of 3-20 years old strabismus patients were categorized into three groups, the average onset age of the three groups were respectively 7.7±1.2, 8.5±1.4,8.1±1.3, and the surgery age were 6.75±1.20 years, 3.42±2.42 years and 3.80±2.10 years, the grade of the strabismus were 31.50^△±5.50^△, 50.50^△±12.56^△ and 52.25^△±13.8^△. Cover test with prism was used to measure the deviation of strabismus, synoptophore was used to qualify three-degree visual function. The postoperative follow-up time was 4 weeks, 6 weeks, and 8 weeks after surgery.

RESULTS:The difference was statistically significant in the average surgery age and grade of the strabismus between congenital paralytic strabismus group and concomitant strabismus groups(P <0.05), and not statistically significant in the average onset age(P>0.05). The convergence recovery rate of the congenital paralytic strabismus patients were respectively 12.5%, 37.5%, 62.5%, 68.8%, and the stereopsis recovery rate were respectively 0.0%, 18.8%, 50.0%, 56.3% after 2, 4, 6 and 8 weeks; the convergence recovery rate of the concomitant exotropia patients were respectively 14.1%, 40.8%, 64.8%, 69.0%, and the stereopsis recovery rate were respectively 1.4%, 31.0%, 54.9%, 59.2%; the convergence recovery rate of the concomitant esotropia patients were respectively 26.3%, 47.4%, 73.7%, 78.9%, and the stereopsis recovery rate were respectively 5.3%, 47.4%, 63.2%, 68.4%. There were no significant differences in orthophoria rate, convergence recovery rate and stereopsis recovery rate between the group of the concomitant exotropia and concomitant esotropia after 2, 4, 6 and 8 weeks(P>0.05; P>0.05).

CONCLUSION: The restoration in convergence and stereopsis of congenital paralytic strabismus patients are lower in the early stage, the convergence recovery rate and the stereopsis recovery rate rise significantly. The binocular visual function of the concomitant exotropia patients and concomitant esotropia patients recover early after 2 weeks, and improve obviously in the later period.