Eli5: Why do eyes hurt when you look into the bright sky after being in a building with mostly artificial light?
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>Eli5: Why do eyes hurt when you look into the bright sky after being in a building with mostly artificial light?
Because that artificial indoor lighting is – compared to common daylight levels – **not very bright**. You’re moving from a low-light environment into a bright environment and your iris need some time to adjust. Before that can happen, too much light will enter your eye.
If light comes from a real lamp, how can it be artificial?
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