In the evening, choose a book over a tablet or e-reader

Today, more than 3-4 out of 10 households own a tablet. These devices emit artificial light called blue light. This blue light is harmful to our eyes and our body, it has an exciting effect and reduces melatonin production, which makes falling asleep longer and causes some very disturbing ailments.

reading on an e-reader in the evening

According to a study published in the journal Proceedings of the National Academy of Sciences, e-readers disrupt sleep. This study was conducted on 12 adults over 2 weeks in a controlled setting with a reading slot on e-readers. Indeed, the individuals had to read for 4 hours (from 6:00 PM to 10:00 PM) on devices of different brands. During their nights, researchers analyzed various elements such as sleep onset latency and sleep duration. The results of this study show that the light emitted by e-reader screens blocks the production of melatonin, the sleep hormone, and thus creates a sleep imbalance. Even more surprising and worrying, the study shows that using a screen before falling asleep is still felt in the morning, with individuals feeling more tired. The study also shows that the consequences of this blue light can be very negative in the long term.

Anti-blue light glasses

The anti-blue light glasses offered by Varionet can filter up to 30% of the harmful artificial blue light emitted by tablet, computer, smartphone, and TV screens for adults. Thanks to these, various ailments (headaches, backaches, eye strain) are less felt, and it is more pleasant to work and read on screens. Anti-blue light glasses are for everyone. We offer anti-blue light resting glasses for 18-40 year olds and anti-blue light reading glasses for presbyopic people over 40.

For children, we offer Cool Blue + anti-blue light glasses without correction that provide 100% protection for children's eyes.


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