Purpose: This study was carried out to determine if light emitting diodes (LEDs) represented a special case in exposing the retina to blue light, when compared with other methods of backlighting television and computer screens and with fluorescent tube lighting.
Method: The spectral distribution of light from computer and television screens (cathode ray tube, plasma screen, organic LEDs, and screens backlit by cold cathode tubes and/or LEDs), domestic type spotlights (LED and fluorescent tube) and objects in the outdoor sunlit environment were measured with a telespectroradiometer. The spectral data were analysed for the proportion of blue light and luminance. The results were also presented as time to reach the occupational safety limit, without regard to the normal 10 000 s time limit by which time there is no summation of exposure.
Results: The amount of blue light in a source is essentially independent of the technology of the light source, but closely related to the correlated colour temperature.
Conclusions: Fluorescent lamps show essentially the same proportions of blue light and LEDs do not represent a special case, given the same correlated colour temperature. Blue-blocking lenses are no more needed with LED sources than with other screen illumination methods or with fluorescent lighting. There is no evidence base on which to recommend blue-blocking lenses for indoor applications.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1111/opo.12713 | DOI Listing |
J Neuroinflammation
January 2025
Stark Neurosciences Research Institute, Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
Over recent years, the retina has been increasingly investigated as a potential biomarker for dementia. A number of studies have looked at the effect of Alzheimer's disease (AD) pathology on the retina and the associations of AD with visual deficits. However, while OCT-A has been explored as a biomarker of cerebral small vessel disease (cSVD), studies identifying the specific retinal changes and mechanisms associated with cSVD are lacking.
View Article and Find Full Text PDFSci Rep
January 2025
Department of Urology, Songjiang hospital affiliated to Shanghai jiaotong university school of medicine, Shanghai, China.
Kidney stones, a common urological disease, may involve the brain-kidney axis in their formation, though the specific mechanism remains unclear. This study aimed to investigate the effects of blue light on relevant metabolic indicators and oxidative stress status in rats with kidney stones through the brain-kidney axis. A rat model of kidney stones was established by administering 1% ethylene glycol and 2% ammonium chloride.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; Faculty of Light Industry, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
The development of green and cost-effective biomass adsorbents is necessary for removing large amounts of dyes from wastewater. In this study, polyurethane prepolymers were synthesized using polycaprolactone diol (OH-PCL-OH), isophorone diisocyanate, and 2,2-dihydroxymethylpropionic acid, which were subsequently dispersed in aqueous carboxymethyl chitosan (CMCS) solution to produce waterborne polyurethane (WPU)-CMCS porous materials. The adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectrometer (FT-IR), thermogravimetric (TGA) and mercury intrusion porosimetry (MIP).
View Article and Find Full Text PDFPhytomedicine
January 2025
Department of Ophthalmology, The First Affiliated Hospital of Zhejiang University, Hangzhou, Zhejiang, China. Electronic address:
Background: With the escalating use of digital devices, blue light (BL) exposure has emerged as a critical concern due to its potential to cause ocular damage. This study explores the protective effects of notoginsenoside R1 (NR1), a bioactive compound from Panax notoginseng (Burkill) F.H.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold of Zhengzhou University, Zhengzhou 450000, China.
Planar 1D photonic crystals (1DPhCs), owing to their photonic bandgaps (PBGs) formed by unique structural interference, are widely utilized in light protection applications. Multifunctional coatings that integrate various light management functions are highly desired. In this study, we present the fabrication of dual-PBG 1DPhCs with high reflectance in both the blue and near-infrared (NIR) regions.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!