METHODS: Forty young adults (age: 22.6 ± 2.0 years, male/female: 15/25) were consecutively enrolled and randomly divided into two groups (3D and two-dimensional [2D] viewing groups) to watch a 30-min movie clip displayed in 3D or 2D mode on a tablet computer. The lens thickness (LT), diameter, curvature, decentration and tilt were measured with anterior segment optical coherence tomography under both non-accommodating (static) and accommodating conditions.
RESULTS: In the static condition, the LT decreased by 0.03 ± 0.03 mm (p < 0.001) and the anterior radius of curvature (ARC) increased by 0.49 ± 0.59 mm (p = 0.001) post-3D viewing. In contrast, following 2D viewing, the ARC decreased by 0.23 ± 0.25 mm (p = 0.001). Additionally, the increase in the steep ARC post-3D viewing was greater in high-myopic eyes than low to moderate myopic eyes (p = 0.04). When comparing the accommodative with the static (non-accommodative) condition, for 3D viewing the lens decentration decreased (-0.03 ± 0.05 mm, p = 0.02); while for 2D viewing, the posterior curvature radius (-0.14 ± 0.20 mm, p = 0.006) and diameter (-0.13 ± 0.20 mm, p = 0.01) decreased.
CONCLUSIONS: Viewing with the autostereoscopic 3D tablet could temporally decrease the thickness and curvature of the lens under non-accommodating conditions. However, its long-term effect requires further exploration.
方法:40名年轻人(年龄:22.6±2.0岁,男/女:15/25)连续入组,随机分为两组(3D和二维[2D]观看组),以观看平板电脑上以3D或2D模式显示的30分钟电影剪辑。透镜厚度(LT),直径,曲率,在非调节(静态)和调节条件下,用眼前节光学相干断层扫描测量偏心和倾斜。
结果:在静态条件下,3D观察后,LT减少了0.03±0.03mm(p<0.001),前曲率半径(ARC)增加了0.49±0.59mm(p=0.001)。相比之下,在2D查看之后,ARC减少0.23±0.25mm(p=0.001)。此外,高度近视眼的3D后急剧ARC观察的增加大于低度至中度近视眼(p=0.04).当比较调节和静态(非调节)条件时,对于3D观看,透镜偏心减小(-0.03±0.05mm,p=0.02);而对于2D观看,后曲率半径(-0.14±0.20mm,p=0.006)和直径(-0.13±0.20mm,p=0.01)下降。
结论:在非调节条件下,用自动立体3D平板观看可以暂时降低晶状体的厚度和曲率。然而,其长期效果需要进一步探索。