No, your eyeballs won't freeze at -50C. Humans (with sufficient protection, natch) work in temperatures approaching -90C.
But you're essentially correct: -50C and +50C are at the extreme limits of human endurance.
Boru
But you're essentially correct: -50C and +50C are at the extreme limits of human endurance.
Boru
‘I can’t be having with this.’ - Esmeralda Weatherwax