Wouldn't it be the opposite? Light themes cause more blue light and thus increasing eye fatigue.
no, it’s a matter of contrast and readability and matching your ambient lighting. i’m in a warmly lit backlit room. i don’t sit in the dark like an interrupt gremlin
And dark themes hide my floaters and are easier on my old eyes.
There is not one singular answer for everybody.
do you use a dark theme in a well lit room? i did for my first year as a dev long ago and got the worst eye fatigue of my life all the time. as soon as i switched to a light theme that matched the room i had zero problems since, that’s my anecdoata