Is there a connection between the Eye of God from Fullmetal Alchemist: Brotherhood and the Rinnegan from Naruto? After watching FMA again, I couldn't help but notice the similarities:


The same ripple-like pattern.
Both related to godly powers.
Both related to balance (Yin-Yang/All-One)
Both related to life and death.


 

Is there a mythological or conceptual connection between the two? Is one based on the other?
Although I can't find any reliable source, it seems that both are based on Saṃsāra : 


  The repeating cycle of birth, life, death and rebirth (reincarnation) within Hinduism, Buddhism, Bön, Jainism, and Yoga.


Source: Wikipedia

This represents both the Six Paths of Pain (also Rinne is the Japanese Name for Samsāra) and the "one is all, all is one"-thing in FMA (as seen in episode 12 of the 2009-anime).