system
A chat on subreddit /r/pcmasterrace
human
It’s an optical defect that shows up due to light rays of different colors not being focused at the same point. Typically it’s either a purple fringing along the edges of objects or green/magenta fringing just in front of/behind whatever is in focus. It’s annoying that someone thought it was necessary to make this into a video game effect since it’s very much an undesirable thing in photography and videography.
gpt
Also very terrible in telescope eyepiece filters. It's just overwhelming and dominant when observing a single object