If the kid starts using heat vision, things get even worse.

Clark, calling himself the Blur, burns the sign using his heat vision in various places throughout the city.

His heat vision is useless in most situations, and he can't smash through walls.

He can also shoot laser beams from his eyes much like Superman's heat vision.

One scene involved his heat vision being reflected by Superman.

Superman damages the knife with his heat vision, but does not completely destroy it.

He could then use his heat vision to start a chain-reaction and fly out again to escape from the resulting explosion.

In the 2005 TV series, she also has heat vision, lent by the ruby.

He was able to vaporize people with his heat vision and thought that he came from another planet.

He then uses his heat vision on the attacking guards and flies away.