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Please read the article. Its about that.

I'll try to explain what I understood from the article: the natural sunlight makes your body release dopamine, dopamine causes the eye not to elongate, not elongation equals not having near-sightedness.

Probably I got that only half right.

Anyhow the article claims it's not looking at close things and the real cause is being inside.

> There is preliminary evidence that the protective effect of outdoor activities on the development of myopia is due, at least in part, to the effect of long hours of exposure to daylight on the production and the release of retinal dopamine.

thank you, I skimmed over this in the article

That's the subject of the article.

Artificial lighting? Less sunlight? Lower light intensity?

yes, there is a theory on how the muscles of the eyes become "miscalibrated", so to speak, if you only look at close things. What is the exact mechanism of the "lower light" theory then?