What is the natural science reason to wear blue light eyeglasses instead of just turning one’s computer display’s blue lights off or very low in spaces where there are no other sources of blue light than the screen the person is watching? Suppose that the person has perfect visual acuity without eyeglasses. Suppose also that all other possible protective measures achieved by the blue light eyeglasses are achieved by other means, such as by using UV filtering eyeglasses of the same shape and frame material and frame color as the blue light eyeglasses assuming that the blue light eyeglasses do have such protection. Economic, ease of use, technical savviness, time needed to configure the display or other such reasons are out of scope of the question. Other situations where there is blue light are also out of scope just as the overall harm caused by blue light.
I wear blue light filtering glasses for working at my desk. You can order them with varying intensity, and there’s some visible differences with higher strength, but often you don’t really notice the difference after a while.
The idea with them isn’t necessarily to filter out all blue light, it’s to filter out some of it, to hopefully reduce some of the strain over a long period, not necessarily to block all blue light at once. It’s also useful on nights when I’m working before bed, because one thing they have proven is that blue light fucks with sleep cycles.
They’re not safety goggles, they’re more like sun screen. It’s gonna get through, but not as much, and that makes a difference over long time frames.