Nature 523, 607–611 (2015); doi:10.1038/nature14650

In this Letter, author Yong-Bin Yan was incorrectly associated with affiliation number 5 (Department of Ophthalmology, Xijing Hospital) instead of affiliation number 4 (State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China). Also, an additional affiliation has been added to author Kang Zhang (number 15; Institute of Molecular Medicine, Peking University, Beijing 100871, China), and affiliation number 3 has changed from ‘Department of Ophthalmology and Biomaterials and Tissue Engineering Center’ to ‘Shiley Eye Institute and Biomaterials and Tissue Engineering Center’. These have all been corrected in the online versions of the paper.