Not the person you're replying to, but I've had the blue-blocker (I think Costco calls them 'computer lenses' confusingly). They do shift colours towards the yellow range, but not as much as the computer "night shift" (so that the rest of the world looks normal) :) I've found that I can sit at my computer for longer, compared to when I didn't have blue-blocking lenses. It's probably just personal preference :)

I'm also very nearsighted :)

I've heard that blocking blue light can help you sleep better...And I'm usually on the computer before bed. Have you noticed any difference w.r.t sleep ? Thanks!