I recently had an eye appointment, and the optometry student who saw me told me that, for my next pair of glasses, I should get lenses with "blue blocker" material. There is some (scant) evidence that blue light from computer monitors causes macular degeneration over time.
Prescription lenses with blue blocker look ugly, IMO, so I opted not to get the blue blocker in my lenses.
At the same time, I don't want to lose my eyesight if I can avoid it.
Are there software solutions available in Ubuntu for turning off or substantially reducing blue light emitted from my monitor -- at the particular wavelengths that have been shown to harm eyes?