Well, I never said it was the explosion or anything from the explosion that made them 'blind'. They weren't blind, all the lighting got cut off *the overhead lamps or the lamps along the side of the tunnel after the cord got severed as a result of the explosion and the rockslide that blocked them off from the others*
Yes, they're in total darkness now, but as in the anime, Ragnite crystals 'glow in the dark'. When that happens, the miners don't need lamps, flashlights or such. But, they were only in a tunnel, not a mining shaft or mining area, so there would not be any ragnite crystals around to provide other means of light once other more 'artificial' means were cut off.
Was all I meant when I wrote that Juliana, Zeri and Melissa couldn't see.
P.S.- No review for the latest Nichol+Franca fic, or thoughts on the new idea for that Casandra one