Also known as the Eye of Providence, the all-seeing eye is most commonly recognized from the back of 'The Great Seal' on a one-dollar bill. Among other rumors, it is believed that the unfinished pyramid with 13 steps, the eye within the capstone, and the two mottoes on the seal are actually elements concealed by the Freemasons. There have been arguments both for and against this; however, no concrete proof has been presented for either.
Some believe the all-seeing Eye means awakening and protection, while some believe it has a more sinister meaning. It has been speculated that the triangle signifies the Holy Trium, i.e., the Father, the Son, and the Holy Spirit. When the eye is shown inside an inverted triangle, speculation is that it signifies the Antichrist. The owl can mean wisdom or darkness. However, the eye can mean something totally different to you, and can be used in a customized tattoo.
Whenever anyone talks about the secret society of the Illuminati, the first image that comes to mind is the All-seeing Eye within a triangle of light. Some say that this was meant to depict the awakening of humankind, or the ability of the Illuminati to show humankind the truth of what we believe as faith, in terms of science. Nothing says Illuminati, like a tattoo of the Eye.
The closest we have ever come to the origin of the All-seeing Eye is the use of it by the Egyptians. To them, however, it was the Eye of Horus. With an intriguing tale accompanying it. The eye to them represented the benevolent and omnipresent one, always watching out for them, and was used as a symbol of protection. It is also known as the Eye of Ra. Similarities have also been found in the design of the eye and the shape of parts of our brain that handle consciousness.
In the Middle East, the eye is depicted in the palm of the right hand. This symbol is meant as protection from the evil eye or those who mean harm to the wearer. Other versions of the symbol that have been discovered are 'The Hand of Fatima' in Islam, 'The Hand of Miriam' in Judaism, and with the word 'Ahimsa' (Non-violence) instead of the eye in Jainism.