Eyewire

Eyewire is a citizen science game from Sebastian Seung's Lab at Princeton University. It is a human-based computation game that uses players to map retinal neurons. Eyewire launched on December 10, 2012. The game utilizes data generated by the Max Planck Institute for Medical Research. As of March 2025, Eyewire has had around 350,000 players and resulted in the tracing of 6,000 neurons.

Eyewire gameplay is used for neuroscience research by enabling the reconstruction of morphological neuron data, which helps researchers model information-processing circuits. It is also used to generate a training dataset to further improve the artificial intelligence that assists the player through the gameplay.

A later project spawned from Eyewire is the Flywire project, which used a similar but more selective citizen science system for its tracing and annotation. Flywire builds on Eyewire and used AIs trained on the dataset produced by Eyewire players. Flywire would go on to complete and publish the first connectome of an adult fruit fly, a structure with about 140,000 neurons.

A sequel project to Eyewire, Eyewire II, was announced on March 31, 2025. It is of a similar scale to Flywire, intending to trace over 100,000 new neurons. Eyewire II is open in its alpha stages to Eyewire players ranked Scythe or higher.