Stephen001

Blue light emitted from computers and phones has become a concern partly because of suppressing melatonin secretion at night, but also in part because it supposedly (I don't know how good the evidence is for this) has negative effects on the eye itself. Given all this, I was surprised to read recently that apparently there is some evidence blue light inhibits myopia progression. https://search.proquest.com/openview/2b430d393996982a099bb1bdc812da2f/1?pq-origsite=gscholar&cbl=18750&diss=y Blue light has been shown to have an inhibitory effect on both myopia induction and progression in both studies involving animal models, as well as human subjects. Specifically, blue light is reported to inhibit axial length elongation and increase choroidal thickness. (Lin et al., 2020a; Lou & Ostrin, 2020; Moon et al., 2017; Rucker et al., 2015; Thakur et al., 2021). The most acceptable hypothesis to explain this effect of blue light on eye growth is based on Longitudinal Chromatic Aberration (LCA) (Lin et al., 2020a; Rucker & Wallman, 2009). Specifically, this hypothesis posits that the inhibitory effect of blue light on eye elongation is a consequence of blue light being refracted more than red light and so focused in front of the retina of an emmetropic eye, while red light is focused behind the retina. This model also rests on the assumption that the relative intensities of the red and blue components of retinal images are encoded in some way. I'm wondering, why is this not mentioned ever in popular messaging on this topic? I know many people have taken to using blue light filters even during the daytime, because of the claims that it's not good for eye health, isn't that just increasing myopia risk, if the quoted passage is true? Or is evidence for this inhibition of myopia just not very strong?

I've asked the LLMs this and they've given me conflicting answers. What they all seem to agree on though is that the combination that is best for legibility isn't the best for eye strain. I'm specifically interested in what causes the least eye strain. I did a superficial Google Scholar search and there's a few studies, but they seem to focus on legibility.