CLARO (Clinical and Laboratory Applications of Research in Optometry) Research Group, Department of Optics, Faculty of Sciences, University of Granada, Granada, Spain.
Ophthalmic Physiol Opt. 2022 Jul;42(4):753-761. doi: 10.1111/opo.12978. Epub 2022 Mar 19.
Dual-focus soft contact lenses for myopia management have demonstrated to be an effective strategy to reduce myopia progression. However, this optical design has been shown to alter visual quality and accommodative function. The aim of this study was to examine the accommodative and behavioural performance during the execution of a psychomotor vigilance task (PVT) while wearing dual-focus and single-vision soft contact lenses.
The steady-state accommodative response was recorded with the WAM-5500 binocular open-field autorefractor during the execution of a 10-min PVT at 50 cm either with the dual-focus (MiSight 1-day) or single-vision (Proclear 1-day) soft contact lenses, using a sample of 23 healthy young adults. Each experimental session was performed on two different days in a counterbalanced order.
A greater lag of accommodation, variability of accommodation and reaction time was found while wearing dual-focus in comparison with single-vision soft contact lenses (mean differences during the 10-min PVT were 0.58 ± 0.81 D, p < 0.001; 0.31 ± 0.17 D, p < 0.001 and 15.22 ± 20.93 ms, p = 0.002, respectively). Also, a time-on-task effect was found for the variability of accommodation and reaction time (p = 0.001 and p < 0.001, respectively), observing higher values over time. However, the lag of accommodation did not change significantly as a function of time-on-task (p = 0.33).
Dual-focus soft contact lens wear influences the steady-state accommodative response and behavioural performance during the execution of a visual vigilance task in the short-term. Eye care practitioners should be aware of these effects when prescribing these lenses for myopia management, and provide specific recommendations according to the individual visual needs.
双焦点软性隐形眼镜在近视管理方面已被证明是一种有效策略，可以降低近视进展。然而，这种光学设计已经被证明会改变视觉质量和调节功能。本研究的目的是检查在执行视觉警戒任务（PVT）时佩戴双焦点和单焦点软性隐形眼镜时的调节和行为表现。
使用 WAM-5500 双眼开放式自动折射仪，在 50cm 处执行 10 分钟的 PVT 时，记录稳定状态的调节反应，使用 23 名健康年轻成年人的样本，佩戴双焦点（MiSight 1 天）或单焦点（Proclear 1 天）软性隐形眼镜。每个实验在两天内以平衡的顺序进行两次。
与单焦点软性隐形眼镜相比，佩戴双焦点隐形眼镜时发现调节滞后、调节变化和反应时间更大（在 10 分钟 PVT 期间的平均差异分别为 0.58±0.81D，p<0.001；0.31±0.17D，p<0.001 和 15.22±20.93ms，p=0.002）。此外，还发现调节变化和反应时间存在任务时间效应（p=0.001 和 p<0.001），随着时间的推移观察到更高的值。然而，调节滞后并没有随着任务时间的变化而显著变化（p=0.33）。
双焦点软性隐形眼镜的佩戴会在短期内影响执行视觉警戒任务时的静态调节反应和行为表现。眼保健从业者在为近视管理开这些镜片时应该注意到这些影响，并根据个人的视觉需求提供具体的建议。
