Looking at the photos the kinked snake seems to be kinked on the body side of the vent not the tail side. If this is the case, I think the kink is severe enough to hinder the passing of normal urates and feces. The snake is most likely not capable of breeding especially if it is female. If it were out of my clutch, I would euthanize that one. The one with the eye will most likely be fine if it is indeed a birth defect and not an injury of some sort. The snake may never be able to see out of that eye but they do not use their eyes as much as we would think they do. The rely more on their heat pits and sense of smell. I would treat the one with the eye as a normal hatchling.