How does blue light(from a phone or computer) cause eyesight to get worse?
In: Biology
Blue light from consumer electronic devices does not harm your eyes directly, they simply don’t have enough energy output to do so.
Blue light does not cause eyesight to get worse.
However, blue light does have *some* measurable effect on your ability to fall asleep – blasting your face with yer average RGB screenlight in night time might disrupt your melatonin output. Hence, a whole bunch of “night mode” apps and OS features that turn your screen more reddish in night.
Usually when people refer to this, it’s more about short term effects. As far as I know, I don’t think it causes any long-term damage to eyesight.
It does affect our ability to fall asleep. Basically imagine our brain has a light sensor that tells it if it’s daytime or nighttime. If it senses that it’s night, it releases a hormone called melanin, which makes us feel tired and helps us fall asleep. Blue light from electronics trick this “sensor” into thinking it’s daytime, so it doesn’t release enough melanin so we don’t feel as tired and makes it more difficult to fall asleep.
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