Blue light filter glasses: What they can do – and what they can’t

What a blue light filter glass does physically, what research says about tired eyes, and how to read a data sheet – with the actual measured values of the BLAU-II glass.

Blue Light, Screen Time and Sleep: What Research Says

What evening screen light does to your internal clock, what studies on amber glasses and Night Shift show – and why clear lenses aren’t a sleep aid.

Where blue light filters are used today

From night mode to cataract surgery, up to screen workplace glasses: where blue light filters are used, what the research says, and why ‘clear’ is not the same as ‘orange’.