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目的分析共同性斜视AC/A比率的特点及应用价值。方法计145例共同性斜视患者。共同性内斜视73例,平均年龄10.48±7.85岁,平均斜视角度+40.90±20.70△。共同性外斜视72例,平均年龄12.96±8.29岁,平均斜视角度-39.78±15.90△。采用同视机法测定AC/A比率。按全国儿童弱视斜视防治学组制定的标准行共同性斜视的分类,将各类斜视的AC/A比率同正常人作对比。结果共同性内斜视的AC/A比率为4.24±2.23△/D,共同性外斜视的AC/A比率为2.80±2.57△/D。二者差异十分显著(P<0.01)。共同性内斜视除部分调节性和先天性同正常人的差异不明显(P>0.05)外,其它各类型同正常人的差异都有明显(P<0.05)和十分明显(P<0.01)的统计学意义。共同性外斜视除分开过强型高于正常人(P<0.01)外,其它各类型都明显(P<0.05)或十分明显(P<0.01)低于正常人。共同性内斜视AC/A比率异常值占36.99%;共同性外斜视AC/A比率异常值占43.06%。结论共同性内斜视的AC/A比率高于外斜视,内斜视中多数类型的AC/A比率高于或近于正常人,外斜视中多数类型的AC/A比率低于正常人。AC/A比率失常是共同性斜视发病的重要因素。AC/A比率在斜视的分类诊断及手术设计上有重要价值。
Objective To analyze the characteristics and application value of AC / A ratio in common strabismus. Methods Total 145 cases of strabismus patients. 73 cases of common esotropia, the average age of 10.48 ± 7.85 years, the average squint angle of +40.90 ± 20.70 △. 72 cases of common exotropia, the average age of 12.96 ± 8.29 years, the average squint angle -39.78 ± 15.90 △. Using the same method to determine the AC / A ratio. According to the national standard for the development of amblyopia strabismus prevention and treatment of children common line strabismus classification, the various types of strabismus AC / A ratio for comparison with normal. Results The AC / A ratio of common esotropia was 4.24 ± 2.23 Δ / D, and the AC / A ratio of common exotropia was 2.80 ± 2.57 Δ / D. The difference was significant (P <0.01). In common esotropia, except for the difference of some regulatory and congenital and normal people was not obvious (P> 0.05), there were obvious (P <0.05) and significant (P <0.01) Significance of learning. Common exotropia was significantly (P <0.05) or significantly (P <0.01) lower than that of normal subjects except for those who were significantly stronger than normal (P <0.01). Common esotropia AC / A ratio of abnormal values accounted for 36.99%; common exotropia AC / A ratio of abnormal values accounted for 43.06%. Conclusions The AC / A ratio of common esotropia is higher than that of exotropia. Most of the types of AC / A in esotropia are higher or lower than those of normal people. Most of the AC / A ratios in exotropia are lower than those of normal people. AC / A ratio disorder is an important factor in the development of common strabismus. AC / A ratio in the classification of strabismus diagnosis and surgical design has important value.