Visual Function Under Bright Light Conditions Tested Using a Blue-Light Absorbing or Clear Lens in Pseudophakic Patients.

IF 1.7 4区 医学 Q3 OPHTHALMOLOGY
Billy R Hammond, Jacob B Harth, Lisa M Renzi-Hammond
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Abstract

Purpose: To evaluate the visual performance of a blue-light filter (BLF). The following visual parameters were assessed: glare disability (GD); chromatic contrast (CC); two-point light thresholds; and dysphotopsia symptoms (snowball and spoke diameter).

Methods: Twenty-five pseudophakic patients previously implanted with a "UV-only" intraocular lens (IOL) were tested using a single-masked randomized cross-over design. In the control condition, a UV-only filter (matched to the implant) was used. In the test condition, a BLF was used (matching the absorbance profile of a common BLF IOL; Acrysof Natural and Clareon; Alcon Research Ltd). The intensity (expressed as log relative energy, LRE) of broad-band xenon light and a sky-blue background needed to veil a central grating target was used to measure GD and CC, respectively. The diameter of spokes/snowballs was determined by measuring their lateral extent induced by a bright white point source. Two-point light thresholds were measured as the separation between two small relatively intense point sources of light (Rayleigh criterion).

Results: The BLF test lens resulted in improved CC (LRE 2.04 vs 1.83) and GD (LRE = 2.46 vs 2.27, p < 0.001). Snowballs (49 vs 69 mm, p < 0.01) and spoke (139 vs 171, p < 0.001) diameters were also reduced in the BLF condition.

Conclusion: About 6% and 10% more light energy was needed to occlude the grating stimulus for GD and CC. Light spread measured using the two-point technique was about 26% less for the BLF. The BLF reduced snowballs and spokes by about 24% and 19%. The BLF significantly improved function across a variety of visual indices.

假性晶状体患者在强光条件下使用蓝光吸收镜或透明镜测试视觉功能。
目的:评价一种蓝光滤光片(BLF)的视觉性能。评估以下视觉参数:眩光失能(GD);彩色对比;两点光阈值;和呼吸困难症状(雪球和辐条直径)。方法:采用单盲随机交叉设计对25例先前植入“仅紫外线”人工晶状体(IOL)的假性白内障患者进行测试。在对照条件下,使用与植入物匹配的紫外线过滤器。在测试条件下,使用BLF(与普通BLF IOL的吸光度相匹配);acryysof Natural and Clareon;爱尔康研究有限公司)使用宽频带氙光强度(表示为对数相对能量,LRE)和遮挡中心光栅目标所需的天蓝色背景分别测量GD和CC。辐条/雪球的直径是通过测量明亮的白点源引起的辐条/雪球的横向范围来确定的。两点光阈值被测量为两个相对较强的小点光源之间的距离(瑞利准则)。结果:BLF测试透镜改善了CC (LRE = 2.04 vs 1.83)和GD (LRE = 2.46 vs 2.27, p p p p结论:对于GD和CC,遮挡光栅刺激所需的光能分别增加约6%和10%,使用两点技术测量的BLF光传播减少约26%。BLF使雪球和辐条分别减少了24%和19%。BLF显著改善了各种视觉指标的功能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Current Eye Research
Current Eye Research 医学-眼科学
CiteScore
4.60
自引率
0.00%
发文量
163
审稿时长
12 months
期刊介绍: The principal aim of Current Eye Research is to provide rapid publication of full papers, short communications and mini-reviews, all high quality. Current Eye Research publishes articles encompassing all the areas of eye research. Subject areas include the following: clinical research, anatomy, physiology, biophysics, biochemistry, pharmacology, developmental biology, microbiology and immunology.
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