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Macular carotenoid supplementation improves disability glare performance and dynamics of photostress recovery

Eye and Vision 2016年第1期3卷 231-238页

作者： James M.Stringham Kevin J.O’Brien Nicole T.Stringham Nutritional Neuroscience Laboratory Department of Physiology and PharmacologyUniversity of GeorgiaAthensGA 30602USA Vision Sciences Laboratory Department of PsychologyUniversity of GeorgiaAthensGA 30602USA Interdisciplinary Neuroscience Program Biomedical Health Sciences InstituteUniversity of GeorgiaAthensGA 30602USA

Background:The so-called macular carotenoids(MC)lutein(L),zeaxanthin(Z),and meso-zeaxanthin(MZ)comprise the diet-derived macular pigment(MP).The purpose of this study was to determine effects of MC supplementation on the optical density of MP(MPOD),repeated-exposure photostress recovery(PSR),and disability glare(DG)***:This was a double-blind,placebo-controlled ***-nine young(mean age=21.7),healthy volunteers participated in this *** supplemented their daily diet with either 10 mg L+2 mg total Z(1 mg Z+1 mg MZ;n=24),20 mg L+4 mg total Z(2 mg Z+2 mg MZ;n=25),or placebo(n=10)for 12 *** primary outcome was a composite measure of visual performance in glare,defined by change in DG and *** outcomes included MPOD and visual *** primary endpoint for outcomes was 12 *** was assessed with customized heterochromatic flicker *** times for an 8 cycle/degree,15%contrast Gabor patch target were determined after each of five successive exposures to intense LED *** threshold was defined as the intensity of a ring of lights through which subjects were able to maintain visibility of the aforementioned *** of all parameters were conducted at baseline,6 months,and 12 ***-measures ANOVA,and Pearson product-moment correlations were used to determine statistically significant correlations,and changes within and between ***:MPOD for subjects in both supplementation groups increased significantly versus placebo at both 6-and 12-month visits(p<0.001 for all).Additionally,PSR times and DG thresholds improved significantly from baseline compared to placebo at 6-and 12-month visits(p<0.001 for all).At baseline,MPOD was significantly related to both DG thresholds(r=0.444;p=0.0021)and PSR times(r=-0.56;p<0.001).As a function of MPOD,the repeated-exposure PSR curves became more asymptotic,as opposed to *** change in subjects’DG thresholds were significantly related to chang

关键词： Lutein Zeaxanthin Mesozeaxanthin Visual performance Photostress recovery disability glare Macular pigment Visual cycle

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Simulation experiments on counter beam lighting in highway tunnel

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Journal of Chongqing University 2010年第3期9卷 139-145页

作者：王志伟 Key Laboratory of Conveyance and Equipment Ministry of EducationEast China Jiaotong University

Counter beam lighting was introduced as well as transverse symmetrical lighting and longitudinal symmetrical *** experiments were carried out by using DIAlux lighting software for the above three lighting *** results show that counter beam lighting is more reasonable to be adopted in the tunnel entrance zone because its threshold increment of disability glare is *** beam lighting can improve the background luminance of the obstacles and lighting efficiency compared with transverse symmetrical lighting and longitudinal symmetrical ***,tunnel lighting energy-saving can be achieved by reducing the road luminance demands and luminaries *** symmetrical lighting is conducive to the large luminaries spacing in the tunnel internal zone;so power consumption can be reduced by decreasing the number of luminaries *** walls are unsuitable to pave with smooth or bright *** height of the luminaries has less effect on counter beam lighting.

关键词： counter beam lighting simulation experiments disability glare lighting efficiency

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