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With the advent of artificial light and electronics, people are being exposed to increased amounts of light before bedtime. While all types of visible light can affect circadian rhythms, blue light has the largest impact The proximity of LED screens to our eyes means we're getting a lot of blue light (Image credit: Pixabay) Blue light: night shift, dark mode, and f.lux
Squinting at screens for long periods isn’t recommended for the overall health of your eyes. If you wear prescription eyeglasses to correct your vision, make sure you’re wearing a prescription intended for the distance between your eyes and your screen — ideally an arm’s length away. Most glasses are formulated for longer distances. Adjust the blue light on your screen Some studies suggest a link between exposure to light at night, such as working the night shift, to diabetes, heart disease, and obesity. That's not proof that nighttime light exposure causes these conditions; nor is it clear why it could be bad for us.Apple's and Microsoft's operating systems and even the preset settings of standalone computer monitors include options to reduce blue-light emissions by adjusting color temperature to a warmer gamut. [25] [26] However, these settings dramatically reduce the size of the color gamut of the display, as they essentially simulate tritan color blindness, thereby sacrificing the usability of the displays. The filters can be set on a schedule to activate only when the sun is down.
One recent exception: Doctors reported that a woman who used an LED face mask to improve her skin had distorted vision and a retinal lesion afterward. However, it’s difficult to say whether blue light, red light, or infrared light caused this damage because the face mask included all three. Eye drops, such as artificial tears, and room humidifiers are all good ways to keep your eyes from becoming too dry and irritated while you’re using blue-light-emitting devices. Use eyeglasses with the right prescription Kumari J, Das K, Babaei M, et al. The Impact of Blue Light and Digital Screens on the Skin. Journal of Cosmetic Dermatology. April 2023. Margrain TH, Boulton M, Marshall J, Sliney DH (September 2004). "Do blue light filters confer protection against age-related macular degeneration?". Prog Retin Eye Res. 23 (5): 523–31. doi: 10.1016/j.preteyeres.2004.05.001. PMID 15302349. S2CID 40276594. Kim TG, et al. (2020). Photochemical retinopathy induced by blue light emitted from a light-emitting diode face mask.You may also want to consider photochromic lenses, which provide UV and blue light filtering indoors and automatically darken in sunlight to increase comfort and reduce glare outdoors. Chen P, et al. (2019). Retinal neuron is more sensitive to blue light-induced damage than glia cell due to DNA double-strand breaks. Shechter, Ari; Quispe, Kristal A; Mizhquiri Barbecho, Jennifer S; Slater, Cody; Falzon, Louise (June 4, 2020). "Interventions to reduce short-wavelength ("blue") light exposure at night and their effects on sleep: A systematic review and meta-analysis". SLEEP Advances. 1 (1): zpaa002. doi: 10.1093/sleepadvances/zpaa002. PMC 10127364. PMID 37192881 . Retrieved May 25, 2022. Kay & Laby;tables of physical & chemical constants;General physics;SubSection: 2.5.3 Photometry". National Physical Laboratory; UK . Retrieved December 9, 2018.
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