Regrown eye contains expected cell types. (A) Hematoxylin and eosin stained section of age-matched control (left panel) and regrown eyes at 5 dps (right panel). Regrown eye contains same eye structures compared to unoperated sibling control. (B-D) Identification of retinal cell types in eye regenerates. Dark pigmented tissue surrounding the retina is the retinal pigmented epithelium (RPE). (B) Eye sections stained with DAPI (DNA), anti-Rhodopsin antibody (rod photoreceptors), and anti-Calbindin-D-28K antibody (cone photoreceptors). (C) Eye sections stained with DAPI, anti-Isl1 antibody (identifies retinal ganglion cells, amacrine cells, bipolar cells, and horizontal cells). (D) Eye sections stained with DAPI, and anti-Glutamine Synthetase (Müller glia). (A-D) Up = dorsal, down = ventral. Scale bars: A-D = 50 μm.