To compare the various types of glaucoma, Inatani et al23 showed that the level of biologically active TGF‐β2, but not total TGF‐β2, is higher in the AH of eyes with primary open angle glaucoma (POAG) than that with primary angle closure glaucoma, pseudoexfoliative glaucoma (XFG) and uveitis‐associated secondary glaucoma. Here, TGFB2 is linked to exfoliation syndrome.