How is the theme blindness and sight shown in the Lord of the Flies?

LOTS of isolation here.

1. Yes, the kids are all isolated from society, the war, adults, and everything else on the island.

2. The growing isolation of the Ralph and Piggy from the rest of the boys.

3. The isolation of the dead guy in the parachute. Everyone's afraid of him because they don't know what it is.

4. The total isolation of Simon from everyone else--especially when he goes into his meditation/fits with the pig head on a stick/Lord of the Flies.

5. You could even go larger-scale and talk about the whole war setting, and consider how Britain is isolated from the rest of continental Europe geographically. Have fun.