Correction to: Nature Biomedical Engineering https://doi.org/10.1038/s41551-020-0569-y, published online 22 June 2020.

In the version of this Article originally published, in the sentence beginning ‘We investigate the signal...’, lipofuscin was mistakenly described as ‘a by-product of ROS’; instead, the sentence should have read: ‘We investigate the signal of an endogenous autofluorescent pigment, lipofuscin, a by-product of cells exposed to oxidative stress that is...’. This error has now been corrected.