@Chris beat me to it!
Folks used to live andwork out of doors.
Guess what color the light was out of doors from that huge blue sky overhead?
There is a strong relationship between lattitude, working out of doors and cataract formation in high intensity sunlight, but more likely the UV light in sunlight, is thought to be the major contributing factor. Farmers and sailors and other out of door workers in the tropics do have higher rates of cataract formation, as well as skin cancer formation and even macular degeneration.. I am not aware that blue light is a significant concern however.
Most glass lenses effectively block UV light, but one needs to see the transmission graphs of the specific lenses to be certain. Plastic lenses are a bit more variable re UV transmission.
Folks have been trying to sell yellow lenses ( blue blocking ) for years. Call me less than wholly convinced. Years ago the pitch was they helped folks with cataracts see "better". but "better" was rarely defined other than "better". Now they pitch blue blockers to sleep better due to the blue light from computer and phone screens.
The way to sleep better is to step away from the computer or phone screen, get some real exercise, and turn in early with the lights off.
Great link @Chris, basically stating what I've believed for a long time.
One thing I do find when using computer screens and wearing bifocals - one needs to keep their monitor low enough that one can look down through their bifocals and see the screen - if the monitor is too high, say at eye height or higher, then one must extend their neck, raise their chin, to get their bifocal high enough to help focus the screen and this sustained extension of the neck can really lead to a stiff neck or even headaches.
If one has dry eyes, sustained reading with suppression of blinking, can aggravate dry eyes. Blink more often, drink more water, or even use artificial tears if needed. Drinking more water often really helps a lot, but it is not intuitive for many folks to drink more water for dry stiinging eyes...
Blue light, well, it is blue....