BDNF and glaucoma: Accordingly, cell survival of primary rat RGCs was evaluated under four different experimental conditions simulating the high pressure glaucoma (untreated RGCs under EHP), normal‐tension glaucoma (untreated RGCs under NHP), neuroprotective‐treated glaucoma (BDNF/RNYK‐treated RGCs under EHP), and normal conditions (BDNF/RNYK‐treated RGCs under NHP).