I've been doing 12 - 14 hour fasts overnight. I find as I'm heading towards the latter part of this before eating, my eyes seem to have a kind of 'film' over them, look a bit red, generally just not bright.........nothing major, I first thought I had conjunctivitis or an allergy or something, but it seems to be at the latter part of the fast.
Just curious more than anything if this has happened to anyone else or they know what might be occurring.