Because he is afraid that they will get broken, and without them he is more vulnerable because he can't see very well.
Jack and his hunters targeted Piggy's glasses because they needed the lenses to start a fire. They believed that having a fire would give them power and control over the group. The conch, on the other hand, represented order and civilization, which Jack's group was trying to rebel against.
Piggy's glasses have the same significance in the 1963 movie as they do in the later 1990s remake and in the original novel. Piggy's glasses serve to identify him as an outsider. He is the only boy on the island who wears glasses. The wearing of glasses is also often used as a literary (and cinematic) device to indicate intelligence. Piggy's glasses also provide the means to make fire and they provide an excuse for conflict between jack's tribe and Ralphs group. The breaking of one lense of Piggy's glasses when Jack pushes him over has great symbolism as does the complete shattering of them when Pigy is killed by the boulder.
Jack used Piggy's glasses by focusing the sunlight through the lenses onto dry leaves and twigs to create a spark and ignite a fire. Piggy's glasses acted as a magnifying glass, harnessing the sun's rays to start the fire.
Jack solves the problem of making fire by stealing Piggy's glasses, using them to start a fire and cooking meat. He disregards Piggy's suggestion of using the glasses for rescue signals, instead prioritizing his desire for power and control over the boys.
They decide to let the fire go out at night and light it again in the morning
The glasses symbolise intelligence and belong to Piggy who is the intelligent one of of the group. Jack is not intelligent and when he steals the glasses, and therefore intelligence, he has no respect for Piggy and wants to glasses purely to produce a fire.
Piggy's glasses can represent many things in this book, they represent power, civilization an wisdom. Without the glasses Jack felt powerless not being able to build a fire and all. So he took them to use them for his own good.
Piggy's glasses get broken when Jack gets back from where ever and everyone is angry at him because he let the fire go out and a plane has just gone by or a ship i cant remember ... piggy stands up to him and says "you said you would keep the fire going" which he didn't. jack gets angry as piggy is standing up to him and "stuck his fist into piggy's stomach" he also "smacked piggy's head" which made his gl;asses fly off and tinkle on the rocks.hope this helpssorry if its a bit crap*Piggy's glasses get broken when he tripped on his own feet and fell on them, he is fat and crushed themPiggy's fat did not crush his glasses. Jack broke them when he got back from hunting. Everyone is mad at him because he let the fire go out and a ship just passed by. Piggy stands up to him and Jack smacks him in the head which sends Piggy's specs flying. That's how they broke.
Jack steals Piggy's glasses because he sees them as a valuable resource needed for making fire, which he believes will help him gain power and control over the group. In his pursuit of dominance, he disregards Piggy and the consequences of his actions.
Jack punched Piggy in the stomach, which caused him to sit down with agrunt. Then Jack stood over him and smacked Piggy's head, this send his glasses flying and one lens broke, as they landed on the rocks.
Ah, the moment when Piggy's glasses break in "Lord of the Flies" is a powerful one. It happens on page 180 in the novel, symbolizing the loss of reason and civilization on the island. But remember, even in moments of darkness, there is always a glimmer of hope and resilience shining through.
They steal the glasses from one of the boys and use the lenses as a magnifying glass.Jack seized Piggy's spectacles and Ralph then uses them as a burning glass to focus the Sun's rays and start a fire. Their intention is to build a signal fire, which can attract any passing ships or planes. However their over enthusiasm leads the boys to build an enormous bonfire which eventually collapses in on itself and releases a shower of sparks which set fire to a patch of jungle further down the mounatin.Use Piggy's glasses.