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Special glasses marketed to filter out blue light likely do not make any difference to sleep quality or eye strain from computer use, according to a new review of studies. Blue-light blocking spectacles have been increasingly recommended, often by optometrists, since the early 2000s. Eye patients are frequently prescribed these lenses in many parts of the world with a range of marketing claims existing about their potential benefits. Some of these claims include that the special glasses may reduce eye strain associated with digital device use, improve sleep quality, and also protect the retina from light-induced damage. However, researchers, including those from the University of Melbourne in Australia, say there is “substantial debate” about whether blue-light filtering spectacle lenses have merit in ophthalmic practice. The research, published in the journal Cochrane Database of Systematic Reviews, assessed data from 17 clinical trials on the benefits offered by these glasses for improving visual performance, providing protection to the retina, and improving sleep quality. The review assessed data from individual studies from six countries, each including five to 156 participants, and the period of time over which the lenses were assessed ranging from less than one day to five weeks. Researchers found that there may be “no short-term advantages” with using blue-light filtering spectacle lenses to reduce visual fatigue associated with computer use, compared to non-blue-light filtering lenses. They say it is also currently unclear whether these lenses affect vision quality or sleep-related outcomes. The research review could also draw no conclusions about any potential effects on retinal health in the longer term. “People should be aware of these findings when deciding whether to purchase these spectacles,” study co-author Laura Downie said. “Our findings do not support the prescription of blue-light filtering lenses to the general population. These results are relevant to a broad range of stakeholders, including eye care professionals, patients, researchers and the broader community,” Dr Downie added. However, scientists said the quality and duration of the individual studies part of the review also needs to be considered. “High-quality, large clinical research studies with longer follow-up in more diverse populations are still required to ascertain more clearly the potential effects of blue-light filtering spectacle lenses on visual performance, sleep and eye health,” Sumeer Singh, another author of the study, said. The potential mechanisms by which these lenses might help with eye strain, sleep, and protecting the retina are also unclear, scientists say. “The amount of blue light our eyes receive from artificial sources, such as computer screens, is about a thousandth of what we get from natural daylight,” Dr Singh said. “Filtering out higher levels of blue light would require the lenses to have an obvious amber tint, which would have a substantial effect on colour perception,” he added. But the new research did not find any consistent reports of adverse side effects from using blue-light filtering lenses. Read More A bed bugs epidemic is sweeping the UK – this is why AI can predict Parkinson’s subtype with up to 95% accuracy, study suggests The return of schedules: How parents can make the most of back-to-school energy

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Apple has issued an urgent update for millions of iPhone users after two critical security flaws were discovered. The tech giant warned that the latest version of iOS 16, called iOS 16.5.1, was required in order to protect against two vulnerabilities that hackers already know how to exploit. One of the bugs involves a “malicious attachment” sent through iMessage, that allows cyber criminals to gain access to an iPhone’s audio recordings, photos and location data. Security researchers said the security flaw, dubbed TriangleDB, has already been exploited through a campaign called Operation Triangulation, which targeted employees of the cyber firm Kaspersky. “The deployment of the spyware is completely hidden and requires no action from the user,” Kaspersky wrote in a blog post earlier this month. “The spyware then quietly transmits private user information to remote servers: microphone recordings, photos from instant messengers, geolocation, and data about a number of other activities of the owner of the infected device.” The second bug affected Apple’s browser engine WebKit, which leaves users exposed to something known as arbitrary code execution. This could result in malicious third parties stealing data or hacking a device. Both exploits could also impact iPad and Mac users, with Apple issuing security fixes for all of these devices. Apple also released a software update for Apple Watch, which brings new features to its smartwatch. The Cupertino company unveiled its latest mobile operating system iOS 17 earlier this month, though it is not yet widely available. A full public release date of iOS 17 will take place when the new iPhone is announced in September. The iOS 16 update covers more than a decade’s worth of devices, going back to the iPhone 6s and Apple Watch Series 3. “This update provides important security fixes and is recommended for all users,” Apple wrote in the release notes for iOS 16.5.1. Apple Watch, iPhone, iPad and Mac users can update their devices by going to the Settings app and selecting ‘General’ > ‘Software update’, and then following the instructions. Read More Apple seeks trademark of ‘actual apple’, Swiss fruit association says Apple Watch 7 pre-order: How to buy the new smartwatch in the UK Apple introduces new version of Watch with complete redesign iPhone 13 - live: UK contract deals and prices for Apple, EE and O2

REPUBLIC, Mo.--(BUSINESS WIRE)--Aug 25, 2023--