This folder contains the documentation for the paper "Retinal oxygen supply shaped the functional evolution of the vertebrate eye" published in eLife. Please address any questions and request for higher resolution data to Christian Damsgaard, christian.damsgaard@bios.au.dk. The sub-folders contain the following files: x Retinal layer documentation: Each folder contains photos of retinal histology from one species. On each photo, a line marks the thickness of the retinal layer indicated by the file name. Abbreviations: PEPRL, pigment epithelium and photoreceptor layer; ONL, outer nuclear layer; OPL, outer plexiform layer; INL, inner nuclear layer; IPL, inner plexiform layer; GCL, ganglion cell layer; NFL, nerve fiber layer. (604.8 MB) https://retinaevolution.bios.au.dk/eLife%20documentation/Retinal layers documentation.zip x Volume_CT: Each folder contains photos of 12 equally spaced planes from CT scans. Each photo contains a random grid, where blue 1s, turquoise 2s, and green 3s mark points hitting the retina, rete, and eye, respectively. (5.64 GB) https://retinaevolution.bios.au.dk/eLife%20documentation/Volume_CT.zip x Volume_US: Ocular morphometrics obtained from ultrasounds. (44.4 MB) https://retinaevolution.bios.au.dk/eLife%20documentation/Volume_US.zip x Thickness_US: Retinal thickness measurements obtained from ultrasounds. (43.3MB) https://retinaevolution.bios.au.dk/eLife%20documentation/Thickness_US.zip x Thickness_CT: Retinal thickness measurements obtained from CT scans. (61.7MB) https://retinaevolution.bios.au.dk/eLife%20documentation/Thickness_CT.zip