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Cool shades : the history and meaning of sunglasses
\"Cool Shades provides the first in-depth exploration of the enduring appeal of sunglasses in visual culture, both historically and today. Ubiquitous in fashion, advertising, film and graphic design, sunglasses are the ultimate signifier of 'cool' in mass culture; a powerful attribute pervading much fashion and pop cultural imagery which has received little scholarly attention until now. Accessible and highly engaging, this book offers an original history of how sunglasses became a fashion accessory in the early twentieth century, and addresses the complex variety of meanings they have the power to articulate, through associations with vision, light, glamour, darkness, fashion, speed and technology in the context of modernity. Cool Shades will be of great interest to students of fashion, design, visual and material culture, cultural studies and sociology, as well as general readers fascinated by this iconic fashion staple\"-- Provided by publisher.
Book
256 Spectrophotometric Properties of 31 Different Commercially Available Blue Blocking Glasses Under Electric Room Lighting
Introduction Blue blocking glasses are often marketed to promote relaxation, sleep, and circadian health by attenuating melatonin-suppressing light exposure. But these glasses represent a wide range of tint and other lens properties. Further, the utility of these glasses under ecologically valid indoor conditions (where light is typically generated from overhead broadspectrum fluorescent lamps) is still unclear, especially across various products. Methods A calibrated spectroradiometer (Ocean Insight), cosine corrector, optic fiber, and software package were used to measure the absolute irradiance (uW/cm^2/nm) emitted from overhead fluorescent lighting in a closeted dark room. Thirty-one commercially available blue blockers were individually placed between the cosine corrector and the luminaire, at a standardized distance and angle, where intensity was measured and analyzed. Each lens was evaluated individually relative to the light source under identical conditions. Then, lenses were collapsed by type into the following groups: red-tinted lenses (RTL), orange-tinted lenses (OTL), orange-tinted lenses with blue reflectivity (OBL), brown-tinted lenses (BTL), yellow-tinted lenses (YTL), and clear reflective blue lenses (RBL). Results There was significant variation in light-blocking across lens types (one-way ANOVA, p < 0.0001). On average, RTL and BTL restricted 59% of the visible light measured from 380-780nm. OTL blocked 47% of the light in this range, while OBL blocked 29%. Both YTL and RBL blocked 14% of the exposure. When narrowing the range of light to 440-530nm (the part of the spectrum most likely to produce a response from melanopsin-expressing retinal ganglion cells), we estimated the following performance: the RTL and OTL blocked close to 100% of the light, OBL blocked 98%, BTL blocked 80%, YTL blocked 33%, and RBL blocked 15%. These differences were statistically significant (one-way ANOVA, p < 0.0001). Individual lenses performed variably within groups, but these differences were small. Conclusion Focusing on the portion of the visible spectrum most likely to suppress melatonin secretion, RTL and OTL blocked exposure the best, followed by OBL, BTL, YTL, and (lastly) RBL. Support (if any) R01MD011600, R01DA051321
Journal Article
Equivalence between solar irradiance and solar simulators in aging tests of sunglasses
Background
This work is part of a broader research that focuses on ocular health. Three outlines are the basis of the pyramid that comprehend the research as a whole: authors’ previous work, which has provided the public to self-check their own sunglasses regarding the ultraviolet protection compatible to their category; Brazilian national survey in order to improve nationalization of sunglasses standards; and studies conducted on revisiting requirements of worldwide sunglasses standards, in which this work is inserted. It is still controversial on the literature the ultraviolet (UV) radiation effects on the ocular media, but the World Health Organization has established safe limits on the exposure of eyes to UV radiation based on the studies reported in literature. Sunglasses play an important role in providing safety, and their lenses should provide adequate UV filters. Regarding UV protection for ocular media, the resistance-to-irradiance test for sunglasses under many national standards requires irradiating lenses for 50 uninterrupted hours with a 450 W solar simulator. This artificial aging test may provide a corresponding evaluation of exposure to the sun.
Methods
Calculating the direct and diffuse solar irradiance at a vertical surface and the corresponding radiant exposure for the entire year, we compare the latter with the 50-h radiant exposure of a 450 W xenon arc lamp from a solar simulator required by national standards.
Results
Our calculations indicate that this stress test is ineffective in its present form.
Conclusions
We provide evidence of the need to re-evaluate the parameters of the tests to establish appropriate safe limits for UV irradiance.
Significance
This work is potentially significant for scientists and legislators in the field of sunglasses standards to improve the requirements of sunglasses quality and safety.
Journal Article
WHERE THE QBS ARE INVESTING
The company, which has raised $ 165 million in three funding rounds, says it's the only device \"consistently validated by science publications and research studies.\" RX3 exited its investment in Prive Revaux, which was sold in 2020 to Safilo Group. Leinart led his team to the RX3 championship and donated the $100,000 prize money to Children's Hospital of Orange County.
Trade Publication Article