Jiménez Raimundo, Redondo Beatriz, Davies Leon N, Vera Jesús
Department of Optics, University of Granada, Granada, Spain.
Ophthalmic Research Group, School of Life and Health Sciences, Aston University, Birmingham, United Kingdom.
Optom Vis Sci. 2019 Aug;96(8):568-578. doi: 10.1097/OPX.0000000000001406.
The present study addresses the accommodative response and its dependence on the type of optical correction used. The results are discussed relative to their possible implications for myopia progression and visual fatigue.
The accommodative response has been investigated owing to its possible relationship with the onset and progression of myopia and visual fatigue. This study explored the influence of wearing soft contact lenses in comparison with spectacles in terms of magnitude and variability of accommodation. In addition, we analyzed the intersession and intermethod repeatability.
Dynamic accommodative response was recorded during 30-second epochs, at five different distances (50, 40, 33, 25, and 20 cm), in 21 individuals (mean refractive error ± SD, -0.79 ± 1.39 D) while wearing either soft contact lenses or spectacles on two different days. To assess repeatability, a second identical intervention was conducted.
Higher lags of accommodation were obtained with the use of soft contact lenses in comparison with the spectacle condition (P = .04, partial η [ηp] = 0.204), and similarly, a higher variability of accommodation at near distances was found during the soft contact lens measurement (P < .001, ηp = 0.647). There was a strong intersession repeatability at all the distances tested for both optical correction methods.
The higher accommodative lag and fluctuations found while wearing soft contact lenses in comparison with spectacles may help to understand the mechanisms underlying myopia progression and asthenopia. These findings may be also considered when testing the accommodative response in research settings. Our test-retest design confirmed that there is a very good intersession repeatability for all the distances in both optical correction methods.
本研究探讨了调节反应及其对所使用的光学矫正类型的依赖性。讨论了这些结果对近视进展和视觉疲劳的可能影响。
由于调节反应可能与近视的发生和进展以及视觉疲劳有关，因此对其进行了研究。本研究探讨了佩戴软性隐形眼镜与眼镜相比，在调节幅度和变异性方面的影响。此外，我们分析了不同时间段和不同方法之间的重复性。
在21名个体（平均屈光不正±标准差，-0.79±1.39 D）中，在两个不同的日子里分别佩戴软性隐形眼镜或眼镜时，在五个不同距离（50、40、33、25和20厘米）的30秒时间段内记录动态调节反应。为了评估重复性，进行了第二次相同的干预。
与戴眼镜相比，佩戴软性隐形眼镜时获得的调节滞后更高（P = 0.04，偏η[ηp]= 0.204），同样，在测量软性隐形眼镜时，近距离的调节变异性更高（P <0.001，ηp = 0.647）。两种光学矫正方法在所有测试距离上都具有很强的不同时间段重复性。
与眼镜相比，佩戴软性隐形眼镜时发现的更高的调节滞后和波动可能有助于理解近视进展和视疲劳的潜在机制。在研究环境中测试调节反应时也可以考虑这些发现。我们的重测设计证实，两种光学矫正方法在所有距离上都具有非常好的不同时间段重复性。
