this post was submitted on 16 Jun 2024
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Blue light doesn't damage the eyes unless there is a burning amount of it (or a burning amount of UV), but people with bad eye focus may find it more straining to read things in blue due to the greater light scatter of the color. The solution is wear your reading glasses, I guess.
What really strains the eyes is focusing on close up objects for hours on end. American eye doctors everywhere have the 30/30/30 rule (every 30 minutes, look at something 30ft away for 30 seconds) as a "let your eye muscles relax for a bit" exercise for those of you always working on something up close.
That said, night filters are good just to help with your circadian rhythm, since the brain looks for a persistent abundance of a particular chunk of blue wavelength to determine "daytime".