The Eye of Sarnath is an extraterrestrial crystalline object. It falls onto Earth in The Incredible Shrinking Turtles, Part 1 when an extraterrestrial spacecraft crashes onto Earth, and the Ninja Turtles dive into a Central Park lake to save the pilot as the spacecraft crashes into the lakewater. Shredder uses one of the fragments to shrink the Turtles and the Empire State Building.
It is later used to power the Timeslip generator in the Future Shark Trilogy.[1]