BDNF and glaucoma: In order to contribute to a better understanding of the role of neurotrophin signaling in glaucoma, the effect of experimental glaucoma on BDNF and TrkB levels in the glaucomatous retina and the SC contralateral to the experimental eye, was examined via ELISA for total BDNF levels and western blotting for TrkB-FL and TrkB-T1.