Specifically, fibers from the nasal half of the left eye and the temporal half of the right eye form the right optic tract; and the fibers from the nasal half of the right eye and the temporal half of the left form the left optic tract.
A Shifting Purpose. Early cell phones were just for talking. Gradually, features like voicemail were added, but the main purpose was talk. Eventually, cell phone manufacturers began to realize that they could integrate other technologies into their phone and expand its features.
Poulsen's device, known as a telegraphone or 'wire recorder' , laid the foundation for the invention of the answering machines used today (though it was also used to record dictation and even music.) The creation of the first practical automatic answering device for telephones is in dispute.