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.
Benefits of Jailbreaking : After you jailbreak iphone 4, you can install any application installer like Cydia [very popular among jailbreakers]. Cydia comes with tons of apps like MyWi which lets your iPhone to convert into a WiFi host spot or My3g which can let you use face-time on 3G network instead of WiFi.here is a lot of buzz since the iphone 4 launch, and people started talking about jailbreaking their device.