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iPad, laptop, e-reader and sleep

Reading before bedtime can be a good way to prepare yourself for sleep. However, beware of using computers, laptops or iPads for reading late at night. The blue light emitted by their screens can inhibit the production of melatonin, a hormone helping us to fall asleep. As a consequence, sleep onset will be delayed. Therefore, to get a good night’s sleep and to wake up refreshed, avoid using computers or the iPad at least about 60 minutes before going to bed.

E-readers such as the Kindle, Sony Reader, BeBook, etc., do not affect sleep negatively. These devices use electronic paper and do not emit light. Thus, reading an eBook on your e-reader before going to sleep cannot do any harm.


If you cannot avoid using the computer late at night, try using white characters on a dark background. You can invert your screen colors as follows:

Windows: On your keyboard, press the ‘Shift’, ‘Alt’ and ‘PrintScreen’ keys simultaneously. Mac: On your keyboard, press the ‘Ctrl’, ‘Alt’, ‘Apple’ and ‘8’ keys simultaneously. You can go back to the normal screen colors using the same keys.

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