What do Piggy's glasses and the conch have in common in the book, specifically for Chapters 1-2?

Both the glasses and the conch serve as a reminder of the
civilized world that the boys in Lord of the Flies have left
behind. Piggy's glasses serve two purposes: They allow him to see clearly, and they
serve as the all-important fire-starter to keep the signal smoke going. The conch also
symbolizes democracy and civilized behavior, allowing the person who holds it to be
heard and his words recognized by the others. They also become important objects for
whoever possesses them. When the boys take the glasses from Piggy, they leave him weaker
and unable to see clearly; the new owners then possess the power of the
fire.