Science is forever growing as we continue to search and explore. In an article published in Ophthamology, a new body part was described that will require textbooks to be re-written and that is already changing the understanding of certain disorders. Thanks to electron microscopy and donated corneas, a new layer in the human cornea, part of the eye, was discovered. Named for it's discoverer, Dua's layer is the final layer of the cornea and was found after each layer of cells in the cornea were separated by puffs of air and scanned individually.
Electron microscopy fires electrons over the surface of or through a sample, able to discern images as small as 50 pm. Most light microscopes, by contrast, are limited to images no smaller than 200 nm, or 200,000 pm.