Figure 3 of Nakamura, Mol Vis 2010; 16:359-368.

Figure 3. Unstained section of human cornea showing the putative regions where point spectra in transmission mode (4 cm−1 resolution, co-added for 256 scans) were acquired. Black apertures (8 μm×8 μm) designate the stem cell region, blue apertures the transit-amplifying cell region, and green apertures the terminally-differentiated cell region.