What does the stealing of Piggy's glasses symbolize?

Even as Golding continues to emphasize the successful rise of Jack as a leader, he suggests that this rule may be short-lived. The shortsightedness Jack displays as a ruler is clear even to Jack himself. Intent on pleasing the boys with games and hunting, he does nothing to address more practical concerns. Faced with the dilemma of providing a feast without a fire, his solution is to steal from the boys who have maintained a sense of responsibility. Ralph, Piggy, Sam and Eric are therefore considerably burdened. Without help from the other boys who are content to play as savages, these four must devote all their energy to maintaining the signal fire, an almost impossible task. The strain Jack has left the boys with is considerable, but this does not matter to Jack if he can only secure the glasses for fire for the feasts. At this point, the glasses symbolize a form of power.