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首页> 外文期刊>Japanese Journal of Ophthalmology >Convergence accommodation to convergence (CA/C) ratio in patients with intermittent exotropia and decompensated exophoria
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Convergence accommodation to convergence (CA/C) ratio in patients with intermittent exotropia and decompensated exophoria

机译：间歇性外斜视和代偿失调患者的收敛适应与收敛（CA / C）比

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Purpose: To evaluate the convergence accommodation to convergence (CA/C) ratio in strabismic patients and to clarify its clinical implications.Methods: Seventy-eight consecutive patients (mean age: 12.9 +/- 6.0 years) with intermittent exotropia and decompensated exophoria who showed binocular fusion at least at near viewing were recruited. The CA/C ratio was estimated by measuring accommodative responses induced by horizontal prisms with different magnitudes under accommodation feedback open-loop conditions. The CA/C ratios were compared with accommodative convergence to accommodation (AC/A) ratios and other clinical parameters.Results: A linear regression analysis indicated that the mean (+/-SD) CA/C ratio was 0.080 +/- 0.043 D/prism diopter or 0.48 +/- 0.26 D/meter angle. There was no inverse or reciprocal relationship between CA/C and AC/A ratios. The patients with lower CA/C ratios tended to have smaller tonic accommodation under binocular viewing conditions and larger exodeviation at near viewing.Conclusions: The CA/C ratio, like the AC/A ratio, is an independent parameter that characterizes clinical features. A lower CA/C may be beneficial for the vergence control system to compensate for ocular misalignment with minimum degradation of accommodation accuracy. (C) Japanese Ophthalmological Society 2004.
机译：目的：评估斜视患者的收敛适应与收敛（CA / C）比，并阐明其临床意义。方法：连续性斜视和失代偿性外斜视的连续性患者78例（平均年龄：12.9 +/- 6.0岁）显示至少在近视时募集了双眼融合。通过在适应性反馈开环条件下测量水平幅度不同的水平棱镜引起的调节响应来估算CA / C比。将CA / C比值与适应性收敛与适应（AC / A）比值及其他临床参数进行比较。结果：线性回归分析表明，平均（+/- SD）CA / C比值为0.080 +/- 0.043 D /棱镜屈光度或0.48 +/- 0.26 D /米的角度。 CA / C和AC / A比率之间没有反比或倒数关系。具有较低CA / C比的患者在双眼观察条件下趋向于具有较小的滋补适应性，而在近视下则具有更大的屈光度。结论：CA / C比值与AC / A比值一样，是表征临床特征的独立参数。较低的CA / C可能有利于散度控制系统以最小化调节精度的方式补偿眼球错位。 （C）日本眼科学会2004。

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