Department of Health Promotion and Behavior (L.M.R.), Institute of Gerontology, University of Georgia, Athens, GA; Research & Development (J.B., J.X.), Johnson & Johnson Vision Care Inc, Jacksonville, FL; and Behavioral and Brain Sciences Program (B.R.H.), Vision Sciences Laboratory, University of Georgia, Athens, GA.
Eye Contact Lens. 2022 Dec 1;48(12):509-515. doi: 10.1097/ICL.0000000000000944. Epub 2022 Oct 6.
We assessed the effects of a HEV-filtering contact lens on positive dysphotopsia (halos and starbursts) and a behavioral index of scatter measured using two-point light thresholds. These effects were assessed by direct comparison to a clear (i.e., non-HEV filtering) contact lens tested in the fellow eye.
Sixty-one subjects were randomized and fit with study lenses and 58 subjects completed the study. A double-masked contralateral design was used. Subjects were randomized to test lens-OD, control lens-OS, or vice versa. Participants were exposed to a point source of broadband simulated sunlight (a 403-nm condition was also tested) that created the appearance of halos/starbursts. The degree of dysphotopsia was measured as the diameter of broadband and violet-induced halos, and broadband light-induced starbursts. Two-point thresholds were assessed as the minimum resolvable distance between two pinpoints of light.
The HEV-filtering lens was statistically superior ( P <0.0001) to the clear lens in all the conditions tested. The HEV-filtering lens significantly reduced halo diameter by 30%, starburst diameter by 23%, and resolvable distance in the two-point condition by 18% (white) and 30% (violet).
HEV-filtering contact lenses can reduce some deleterious effects of bright broadband light by decreasing light scatter, halos, and starbursts.
我们评估了一种能够过滤 HEV 的隐形眼镜对正性彗差（晕影和光爆发）和使用两点光阈值测量的散射行为指标的影响。通过与同眼测试的透明（即非 HEV 过滤）隐形眼镜进行直接比较来评估这些效果。
61 名受试者被随机分配并试戴研究镜片，58 名受试者完成了研究。采用双盲对侧设计。受试者随机接受测试镜片-OD、对照镜片-OS，或反之亦然。研究人员让参与者暴露在宽带模拟太阳光的点光源下（还测试了 403nm 的条件），从而产生晕影/光爆发的外观。将彗差的程度测量为宽带和紫光引起的晕影的直径，以及宽带光引起的光爆发的直径。两点阈值评估为两个光点之间可分辨的最小距离。
在所有测试条件下，HEV 过滤镜片在统计学上均优于透明镜片（P<0.0001）。HEV 过滤镜片可使晕影直径显著减少 30%，光爆发直径减少 23%，两点条件下的可分辨距离减少 18%（白光）和 30%（紫光）。
HEV 过滤隐形眼镜可以通过减少光散射、晕影和光爆发来降低明亮宽带光的一些有害影响。
