eLife assessment
This useful study presents a novel method to analyze the correlation between the degree of pigmentation, and the gene expression profile of human-induced pluripotent stem cell-derived Retinal Pigmented Epithelial (iPSC-RPE) cells at the single cell level, trying to establish if this parameter might be of use as a guide for transplantation. The presented evidence is incomplete: pigmentation was not an indicator of functionality or maturity and the data, although obtained from a pertinent approach, is limited to in vitro conditions; further, this approach is not complete since no attempts were made to graft iPSC-RPE.