While light of any kind can suppress the secretion of melatonin, blue light at night does so more powerfully. Harvard researchers and their colleagues conducted an experiment comparing the effects of 6.5 hours of exposure to blue light to exposure to green light of comparable brightness. The blue light suppressed melatonin for about twice as long as the green light and shifted circadian rhythms by twice as much (3 hours vs. 1.5 hours). Also, when outdoors in daylight, always wear sunglasses that filter blue light (as well as 100% of the sun's UV rays) after cataract surgery. And when using computers and other digital devices for extended periods, wear computer glasses that provide better blue light filtering than standard reading glasses. 6. Not all blue light is bad.

Comerford, Ruth (27 March 2023). "Where was Blue Lights filmed? Filming locations in Belfast for the new BBC One drama series". inews.co.uk . Retrieved 28 March 2023.Set pictures from series 2 of BBC's Blue Lights reveal possible new recruits". BelfastTelegraph.co.uk. 23 August 2023 . Retrieved 28 August 2023. If you have cataracts and are about to have cataract surgery, ask your surgeon what type of intraocular lens (IOL) will be used in your procedure. Some IOLs may be better than others at restoring some level of blue light protection for your retina after surgery.

Generally, scientists say the visible light spectrum comprises electromagnetic radiation with wavelengths ranging from 380 nanometers (nm) on the blue end of the spectrum to about 700 nm on the red end. (By the way, a nanometer is one billionth of a meter — that's 0.000000001 meter!) The AAO recommends that you take the steps below to reduce digital eyestrain. Practice the 20/20/20 strategy Too much exposure to ultraviolet light from the sunincreases the risks of eye diseases, including cataracts, growths on the eye and cancer. We know less about blue light. Its effects are still being researched. On the other hand, virtually all visible blue light passes through the cornea and lens and reaches the retina. 4. Blue light contributes to visual discomfort. Blue light scatters more easily than most other visible light. This may make it difficult for your eye to focus when receiving blue light. Instead, your eye may digest blue light as poorly focused visual static. This reduction in contrast may make it more difficult for your eye to process blue light, potentially contributing to eyestrain.

LED Spotlights

The issue is fuzzier around eye health, though (more on this further down). Lots of uninterrupted screen time can absolutely irritate your eyes, though the issue may simply be because you’re focusing your attention at a fixed distance for hours on end, and therefore straining your vision. As ever, it’s good advice to take regular breaks from your screen, look out the window (if you have one), and walk about when you can to vary the distance your eyes are focusing on. Alkozei A, et al. (2017). Acute exposure to blue wavelength light during memory consolidation improves verbal memory performance.

OHSA sets a few regulations that the operator must obey while using the blue spot. These guidelines are set to ensure that the LED can be used safely without harming the driver or the pedestrians. Some of the OHSA regulations are:

Keep Pedestrians Safe In The Workplace

https://www.aoa.org/news/clinical-eye-care/health-and-wellness/blue-light-hype-or-much-ado-about-nothing?sso=y Blue light from sunlight is very important in regulating circadian rhythm — our natural wakefulness and sleep cycle. Exposure to blue light from the sun during daytime hours helps maintain a healthy circadian rhythm. Blue light filters and protective eyewear Blue light does affect the body’s circadian rhythm, our natural wake and sleep cycle. During the day, blue light wakes us up and stimulates us. But too much blue light exposure late at night from your phone, tablet or computer can make it harder to get to sleep. Without getting into complicated physics, there's an inverse relationship between the wavelength of a light ray and the amount of energy it contains. Light rays that have short wavelengths have more energy and those with longer wavelengths contain less energy. A range of visual warning devices suitable for any type of material handling equipment has been developed.

So, about one-third of all visible light is considered high-energy visible (HEV) or “blue” light. Key points about blue light Singh, Anita (28 March 2023). "Blue Lights, review: BBC One's Belfast cop drama deserves as much hype as Line of Duty". The Daily Telegraph . Retrieved 28 March 2023. Kelly, Laura (27 March 2023). "Sian Brooke 'fell in love with Belfast' making gritty police drama Blue Lights". Big Issue . Retrieved 28 March 2023. The result is that you lose the ability to see the center of your field of vision. You may still be able to see things on the periphery. But details and objects in the center of your sight lines may become blurry and, over time, more difficult to see. If blue light does have adverse health effects, then environmental concerns, and the quest for energy-efficient lighting, could be at odds with personal health. Those curlicue compact fluorescent lightbulbs and LED lights are much more energy-efficient than the old-fashioned incandescent lightbulbs we grew up with. But they also tend to produce more blue light.Interview with Gilles Bannier – Director & Executive Producer of Blue Lights". Pressparty.com. 23 March 2023 . Retrieved 28 March 2023.