To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 3 Young lGMR>GCaMP6m/+ adult retina at a proximal plane (Fig. S3), showing Ca2+ waves in primary pigment cells in the center and IOC waves in the periphery of the eye. Calcium waves facilitate and coordinate the contraction of endfeet actin stress fibers in Drosophila interommatidial cells Donald F. Ready, and Henry C. Chang Development 2021. 148:None-None; doi: 10.1242/dev.199700 Download Original Video