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atomfullerene t1_j52sgbh wrote

> Before the dark times.

In a quite literal sense....it seems nearsightedness happens because children spend more time indoors, in conditions of indoor lighting. Indoor lighting is a whole lot dimmer than outdoor light, and that means the signaling process the eyes use to control their growth doesn't work properly.

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alloslothrus t1_j52t3cd wrote

Some even argue that you shouldn’t wear sunglasses outside all the time, and also gazing sun rises and sunsets does wonders.

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