For example, an Iowa district court in November 2006 halted all sales of See Clearly Method kits that had been marketed for several years by a company called Vision Improvement Technologies as a way to improve vision through eye exercises.
Jailbreaking is a hack that allows developers to access the file system of your iPhone, iPad, iPod Touch, meaning the root directory. In simpler terms it means that developers can now have access to all the files on your iPhone, iPod Touch, iPad meaning they can create apps that are possible of doing pretty much anything.
Jailbreaking is removing Apple's restrictions on iOS devices (iPod touch, iPhone, iPad), or otherwise making modifications to the operating system that are not authorized by Apple. Jailbreaking is a violation of the Terms and Conditions you agreed to in order to use your iOS device. Restoring a jailbroken device is not always so easy, contrary to what some say. It is easy to get stuck in a restore loop that bricks your device.