After Class 4/14

In today's wonderful class, we entered the world of Corporate Identity Systems. This era of design began to boom during the 1950s and is still a crucial aspect of businesses today. It all began with Peter Behrens at AEG (considered to be the first full identity system) and Olivette Corporation creating logos/identity systems for the public to associate both of their companies to. By doing this recognition of the company shot up to large numbers. One of the most recognizable logos in today's world that has lasted since the beginning is CBS (The Colombia Broadcasting Station). CBS's logo, which is still in existence today is a large eye. Simple, yet "eye catching". It was because of these people and companies that logos became a very important, if not most important, part of a business' identity to the public.

Question: Why is CBS's eye still used today? What about the eye has made it so likeable and useable today? Some logos have changed over years, but the CBS eye hasn't changed that much. Why not?