Abstract: Provided herein are methods of protecting all or a portion of the optic nerve fiber layer within the optic nerve/lamina cribrosa (ONLC) complex in an individual in need thereof, comprising administering to the individual a therapeutically effective amount of an agent that results in crosslinking of collagen in the indiviudal's peripapillary sclera, thereby stiffening the individual's peripapillary sclera and protecting all or a portion of the optic nerve fiber layer within the ONLC of the individual. In a particular embodiment, the invention is directed to methods of treating glaucoma in an individual in need thereof, comprising administering to the individual a therapeutically effective amount of an agent that results in crosslinking of collagen in the indiviudal's peripapillary sclera, thereby stiffening the individual's peripapillary sclera and treating the glaucoma in the individual.