The Wadjet is a powerful symbol of protection also known as the "Eye of Horus" & the "all seeing eye". The symbol was used in jewelry to ensure the safety & health of the bearer & provide wisdom & prosperity. www.ancientegyptonline.co.uk/eye.html
The Eye of Horus personified in the goddess Wadjet also written as Wedjat,Uadjet, Wedjoyet, Edjo or Uto and as The Eye of Ra or "Udjat" is an ancient Egyptian symbol of protection and royal power. http://en.wikipedia.org/wiki/Eye_of_Horus
