Supplementary Movie 1

Zebrafish retinal cells reaggregate in microwells within 3 hours.
Movie showing 24hpf retinal cells settle to the bottom of the microwell and upon making contact, immediately begin to aggregate. Cells are fully aggregated by 3 hours in culture. Maximum intensity projection of 15 slices (1μm apart). 3 hour movie shown at 10 frames per second.