“…Reports of corneal xenotransplantation models show different results in different species. In guinea pig‐to‐rat corneal xenotransplantation, the mean survival time (MST) was about 3 to 8 days [1], in guinea pig‐to‐mice, 9 to 16 days [3,5,6], and in rat‐to‐mice, 5 to 7 days [7,8]. But in a human‐to‐monkey model, most corneal grafts retained clarity for more than 6 months [9].…”