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The effect of HUMSCs and HUMSC-sEVs on corneal epithelial wound healing in vivo. (a, c) Fluorescein-stained images of defect corneas, before and after treatment with HUMSCs, HUMSCs-GW4869, HUMSC-sEVs, or PBS. (b) H&E staining showed the histologic appearance of the cornea. Data are expressed as the means ± SD. ∗P < 0.05, ∗∗P < 0.01, and ∗∗∗P < 0.001, n = 8.
