Why is it bad for mice to be born with their eyes open?

Many mammals are born with their eyes closed like this. It has to do with whether or not the babies need to see right after birth or not. Mice (and rabbits) are born in dark burrows and cared for by their mothers, so they don't need to have their eyes open right away. Animals like horses need to see if a predator is approaching, so they're born with their eyes open.