I suspect many people on here are old enough to remember Joe Sugarman making late-night infomericals for BluBlocker sunglasses. His most famous one involved Dr. Geek on Venice Beach. Here's a short, poor quality, clip from youtube. https://www.youtube.com/watch?v=_Png-PC0ews
How is this relevant for CPAP? I dunno. Maybe if you wear blue-blocking sunglasses your apnea gets better?
I have prescription glasses (not sunglasses) with a slight blue tint to them. The opticians call them "computer glasses" or something like that. They do help cut down on blue light (this helps people focus), but the effect is relatively mild. They also have an anti-reflective coating which helps make the text on cpaptalk.com more readable for us old fogies.

