Just tell me, do they work?

Yes. Very much so. Some online chatter is quite critical of blue light glasses and their effect. However, this is usually related to other claims, other than helping with sleep, that have not necessarily been proven. Certain strengths of light-blocking glasses have different capabilities, they should not be lumped into the same functionality - that's unrealistic and causes confusion and scepticism.

Melatonin production

Blue and green light wavelengths, especially those emitted by electronic devices like smartphones and computers, can suppress melatonin production, which is essential for regulating sleep-wake cycles. Blocking these wavelengths can help maintain optimal melatonin levels, promoting better sleep. (Cajochen et al., 2011)

Sleep Quality

Studies have shown that filtering blue and green light wavelengths, particularly in the evening hours, can lead to improved sleep quality by reducing the disruption of circadian rhythms. This can result in longer and more restorative sleep periods. (Chang et al., 2015)

Reduced Insomnia Symptoms

Blocking blue and green light wavelengths before bedtime has been found to alleviate symptoms of insomnia and improve overall sleep efficiency. This is particularly beneficial for individuals who experience difficulty falling asleep or maintaining sleep throughout the night. (Figueiro et al., 2012)

Enhanced Alertness in the Morning

By minimizing exposure to blue and green light wavelengths in the evening, individuals may experience increased alertness and cognitive performance upon waking in the morning. This can contribute to a more refreshed and energized start to the day. (Chellappa et al., 2011)

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