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The effect of cell density on light transparency of FCSC-sheets made from FCSCs compared to the native cornea. A Light transparency of the native cornea, FCSC-sheet at 3 × 105 cell/cm2 density density are shown by gross images. B The transparency of the native cornea, FCSC-sheet at 3 × 105 cell/cm2 density, and FCSCs-sheet at 6 × 105 cell/cm2 density measured by UV-spectrometry
