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Robert S. - Comments

It's not central to the podcast, but the cornea is much much thicker than just 2 cells. The cornea's thickness is around 570 μm, the epithelial layer on the surface is about 50μm (7+ cell layers). If I remember correctly it is the layer of collagen under the epithelial layer that when damaged causes a lot of the neovascularization and scarring associated with infections and mechanical damage, but that's remembering a primer from quite a long time ago.

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