Blue light blocking glasses are often marketed as a way to reduce eye strain and improve sleep quality. As of my knowledge cutoff in September 2021, research on the effectiveness of blue light blockers is somewhat mixed, and more studies are needed to fully understand their benefits and potential drawbacks.
Blue light is part of the visible light spectrum and is emitted by the sun, as well as by digital screens and artificial lighting. It’s been associated with a few health issues, including eye strain and disruptions to the sleep-wake cycle.
Regarding eye strain, there isn’t a lot of solid evidence that blue light glasses can help. Most digital eye strain is due to factors like poor lighting, not blinking enough, and keeping the eyes focused at the same distance for extended periods.
Concerning sleep, there’s more evidence, but it’s still not entirely clear. Blue light can interfere with the production of melatonin, a hormone that regulates sleep. Using devices that emit a lot of blue light in the evening can make it harder to fall asleep. Some studies have found that wearing blue light glasses in the hours before bedtime can help improve sleep, but other studies have not found significant effects.
Ultimately, if you’re experiencing eye discomfort or difficulty sleeping, it might be worth trying blue light glasses to see if they help. However, other strategies can also be beneficial. These include taking regular breaks from screen time, adjusting the lighting and screen settings on your devices, and having a consistent sleep schedule.
Always consult with a healthcare provider or an eye care professional if you have concerns about your eyes or your sleep.