TGFB1 and glaucoma: Cultured porcine TM cells express TGF‐β receptors with an estimated density of 4000 per cell.31 These studies suggest that the human eye, in particular the TM, is sensitive to TGF‐β, further implying that the elevated levels of TGF‐β seen in the AH of patients suffering from glaucoma have its biological actions in the TM.