First time hearing this

> The time of day of any potential violet-light therapy for myopia also could matter.

Before anyone rushes to change desktop backgrounds, any effect might involve actual "violet" wavelengths of light (380nm) [0] as opposed to mix of typical LED-reds and LED-blues that are visually similar. Plus then you have a new risk, with blue light at night affects circadian rhythms.

I suppose one could create their own light-emitting source, but I'd be afraid of accidentally scorching my retinas with strong invisible UV.

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[0] https://pubmed.ncbi.nlm.nih.gov/22043319/

Happy to see this research. Some old studies showed that Asian children who moved to Australia had a lower incidence of myopia. Perhaps due to more time spent outdoors:

https://healthland.time.com/2012/05/07/why-up-to-90-of-asian...

The science is interesting, but it seems like the solution "go outside" is available regardless of the details?