It is the home to the symbiotic worm which gives the Aviar their cognitive talents. Every Aviar comes to Patji's Eye when they are young to gain their talent. The worms feed off of the fruits of Patji's Finger, which only grow on Patji, and the Aviar gain the symbiont by eating the worms.
The trappers know about Patji's Eye and what the Aviar do there, but they do not go there often.
Is a natural manifestation of Investiture and is much smaller than most others found in the cosmere.