|“You mean the powerful storm cyclone above the clouds? But its altitude is far too high for the Bounty to reach.”|
|— Nya to the Ninja, Wu and Misako in "Peak-a-Boo"|
The Blind Man's Eye is a hurricane-like storm that passes over the highest altitudes of Ninjago.
The only place high enough to reach it is the peak of the Wailing Alps, and the storm itself is one of the ways to reach the Cloud Kingdom, the realm where destiny is written and where the Sword of Sanctuary was held.
The ninja used the Blind Man's Eye to get to Cloud Kingdom to obtain the Sword of Sanctuary.
After seeing that they were in "Strangler's Path" Lloyd mentioned that half of the names given to dangerous places aren't accurate. The Blind Man's Eye is one of the names he listed.