Video 1

Movie S1. Serial block-face scanning electron microscopy (SBEM) sections show that an evulsion containing mitochondria is fully surrounded by astrocyte processes at the optic nerve head glial lamina. This is the same evulsion shown in Fig. 1 A and B. Frames are 70 nm apart. Cyan marks the contour of the evulsion, and red marks individual mitochondria. (Scale bar: 1 μm.)