  Optical coherence tomography offers astounding opportunities to image the
complex structure of living tissue, but lacks functional information. We
present dynamic full-field optical coherence tomography to image living human
induced pluripotent stem cell-derived retinal organoids non-invasively. Colored
images with an endogenous contrast linked to organelle motility are generated,
with sub-micrometer spatial resolution and millisecond temporal resolution,
opening an avenue to identify specific cell types in living tissue via their
function.
