There is at least some support for myopia being associated with close focal distance activities, as mentioned in this meta analysis:
https://www.nature.com/news/the-myopia-boom-1.17120
In particular, my article discusses randomized experiments and the opinion of multiple disagreeing experts. Your article (also from 2015) is a meta analysis of observational studies on the correlation between near work and myopia, not the overall question of myopia origins. As far as I can tell, I don't think they try to test whether light exposure is the underlying cause, nor does you article claim represent the opinions of anyone besides the three authors.
I welcome links to more recent and comprehensive reviews, though. I definitely don't think this case has been closed.
You might have been facetious, but FYI, the favored theory for the cause of normal myopia is insufficient UV light exposure during childhood. Eyestrain and close focal distance are not thought to produce it even though the latter is correlated with low UV light from being indoors.