Is it better for your eyes to have a phone brightness set low or high when it’s night (pitch black), and why?

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Is it better for your eyes to have a phone brightness set low or high when it’s night (pitch black), and why?

In: Biology

Doesn’t matter. There’s no evidence to suggest that low or high light in the dark has any lasting effect on your eyes.

Better to set it to low.

Your eyes use blue light (light of the sky) to synchronize the body’s internal clock. Blue light means daytime which means you should stay awake. Our digital devices nowadays produce a great deal of blue light. The more blue light exposure at night you get, the more your body’s internal clock gets confused, causing you to have worse sleep at night.

High brightness will also cause your eyes to lose dark sensitivity at night. If you stare at something bright for a long period of time, you’ll notice that you won’t be able to see well in dim lighting. This recovers in ~20-40 minutes in darkness and is known as dark adaptation. If you find yourself taking a long time to adjust to darkness, go see an eye doctor as this is a symptom of eye disease.

Low and with a warm light filter setting. Blue light is bad for your beating when it’s sleepy time