Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai, China.
NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China.
Invest Ophthalmol Vis Sci. 2022 Feb 1;63(2):9. doi: 10.1167/iovs.63.2.9.
Stereoscopic viewing has an impact on ocular dynamics, but its effects on accommodative functions are not fully understood, especially for autostereoscopic viewing. This study aimed to investigate the changes in dynamic accommodative response, accommodative amplitude, and accommodative facility of myopes after autostereoscopic visual training.
We enrolled 46 adults (men = 22 and women = 24; age = 21.5 ± 2.5 [range = 18-25] years, spherical equivalent: -4.52 ± 1.89 [-8.88 to -1.75] diopters [D]) who visited the Eye & ENT Hospital of Fudan University. The study population was randomly divided into three-dimensional (3D) and two-dimensional (2D) viewing groups to watch an 11-minute training video displayed in 3D or 2D mode. Dynamic accommodative response, accommodative facility, and accommodative amplitude were measured before, during, and immediately after the training. Accommodative lag and the variability of accommodation were also analyzed. Visual fatigue was evaluated subjectively using a questionnaire.
Accommodative lag decreased from 0.54 ± 0.29 D to 0.42 ± 0.32 D (P = 0.004), whereas accommodative facility increased from 10.83 ± 4.55 cycles per minute (cpm) to 13.15 ± 5.25 cpm (P < 0.001) in the 3D group. In the 2D group, there was no significant change in the accommodative lag (P = 0.163) or facility (P = 0.975), but a decrease in accommodative amplitude was observed (from 13.88 ± 3.17 D to 12.71 ± 2.23 D, P = 0.013). In the 3D group, the accommodative response changed with the simulated target distance. Visual fatigue was relatively mild in both groups.
The immediate impact of autostereoscopic training included a decrease in the accommodative lag and an increase in the accommodative facility. However, the long-term effects of autostereoscopic training require further exploration.
立体视觉会对眼动产生影响，但立体视觉对调节功能的影响尚不完全清楚，特别是对于自动立体视觉。本研究旨在探讨近视患者接受自动立体视觉训练后动态调节反应、调节幅度和调节灵活性的变化。
我们招募了 46 名成年人（男性 22 名，女性 24 名；年龄 21.5 ± 2.5[范围 18-25]岁，等效球镜度：-4.52 ± 1.89[-8.88 至-1.75]屈光度[D]），他们都曾到复旦大学眼耳鼻喉科医院就诊。研究人群被随机分为三维（3D）和二维（2D）观察组，分别观看 3D 或 2D 模式下的 11 分钟训练视频。在训练前、训练中和训练后立即测量动态调节反应、调节灵活性和调节幅度。还分析了调节滞后和调节变化的可变性。使用问卷评估视觉疲劳的主观感受。
3D 组的调节滞后从 0.54 ± 0.29 D 降至 0.42 ± 0.32 D（P = 0.004），调节灵活性从 10.83 ± 4.55 次/分钟（cpm）增至 13.15 ± 5.25 cpm（P < 0.001）。在 2D 组，调节滞后（P = 0.163）或灵活性（P = 0.975）没有显著变化，但调节幅度减小（从 13.88 ± 3.17 D 降至 12.71 ± 2.23 D，P = 0.013）。在 3D 组，调节反应随模拟目标距离而变化。两组的视觉疲劳都相对较轻。
自动立体视觉训练的即时影响包括调节滞后的减少和调节灵活性的增加。然而，自动立体视觉训练的长期效果需要进一步探索。
