Blue blockers
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Blue blockers, or blue light blocking glasses, have been discussed by in the context of protecting circadian rhythms and overall eye health. Here are key points about their use from the episodes:
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Use During Screens or Late Night: Blue blockers are recommended if you find yourself using screens late at night as they can help mitigate the disruption of melatonin production which is crucial for sleep. Blue light exposure at night can inhibit melatonin release, so wearing blue blockers while using devices can be beneficial in these situations 1.
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Not for Daytime Use: During the day, blue light is beneficial because it helps regulate the body's internal clock and maintain alertness. advises against wearing blue blockers in daylight as they can prevent essential blue light from setting the circadian rhythm properly. This light exposure is important for mood regulation and cognitive function throughout the day 2 3.
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General Light Exposure Advice: It's advised to maximize exposure to natural light, particularly blue and yellow light, during the day and minimize any bright light exposure late in the evening. This practice supports both mental and physical health by aligning with natural circadian rhythms 4.
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No Strong Evidence for Eye Health Benefits: According to , blue blocking glasses became popular during the pandemic as screen time increased. However, there is no conclusive data proving they help prevent eye damage or improve eye health significantly. The emphasis should be on reducing exposure to all bright light at night rather than just blue light 5.
Overall, blue blockers can be useful during the night to reduce light-induced sleep disturbances, but they are not recommended for use during the day when natural blue light exposure is beneficial.
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