Article note: Huh, just staring at 670nm LEDs for a few minutes a day noticeably improved color perception and low-light sensitivity in the 40yo+ participants.
Neat!
When I am weaker than you, I ask you for freedom because that is according to your principles; when I am stronger than you, I take away your freedom because that is according to my principles.
— [apparently not actually]Louis Veuillot, but attributed to him a century before Frank Herbert did so