应用梯度性AC/A值评价屈光矫正对青少年近视患者的临床意义

目的：对青少年近视患者进行AC/A值的测定,从而推测配戴框架眼镜对青少年近视发展的影响,客观地对其评价以指导临床工作。方法：对33例66眼首诊为近视的青少年者进行研究,年龄在13～16岁,利用综合验光仪对其进行规范的主觉验光,确定最终的眼镜处方,屈光不正度（等效球镜）为-1.60±0.60D。利用risely旋转棱镜测定屈光矫正前后的梯度性的AC/A值。3～6mo后复测梯度性AC/A值。应用SPSS16.0统计软件对结果进行统计学分析。结果：矫正前AC/A值为（2.26±0.79）△/D,矫正后为（4.88±1.22）△/D,戴镜3mo后为（4.09±0.87）△/D。平时戴镜3mo以上者,AC/A比率趋于正常。统计学分析有显著差异（P〈0.05）。结论：临床中,正确适当度数的凹透镜除提高视力外,可恢复调节与集合的平衡和正常双眼单视功能,从而缓解近视发展。

Clinical analysis of gradient AC/A radio for ametropia correction on teenagers

AIM:To investigate the influence of wearing glasses for teenagers’ myopia by determining the gradient AC/A radio,and to assess the role of the gradient AC/A radio made in myopia development and progression. METHODS:The study comprised 33 cases (66 eyes) of myopia. Refraction was measured with MPMVA, the gradient AC/A radio measured with risely prism on Phoropter. The main statistic soft ware SPSS 16.0 was used. RESULTS:After wearing glasses,the gradient AC/A ratios were higher than before, and went down after 3 months, there was statistic difference between them (P<0.05). CONCLUSION:After teenagers of myopia wear suitable glasses,their accommodative and convergent parameters such as the gradient AC/A radio will be normalized gradually. Thus it is beneficial for recovering the function balance of accommodation and convergence.