I first noticed the blue light issue when xmas led lights were put on trees around the holidays. Blue blurry things. Now my credit union has their sign in blue and I can’t read it.

10 years later I developed astigmatism in both eyes. Dark mode is really blurry in some settings.

The blue light thing, as I understand it, is where you first begin to notice astigmatism. The wavelength is shorter and a very slight astigmatism becomes more apparent.