The consensus is that "the damage caused by glaucoma can't be reversed" (e.g. https://www.mayoclinic.org/diseases-conditions/glaucoma/diagnosis-treatment/drc-20372846).

Will this consensus change before 2028? I would consider it has changed if the statements by most reputable medical institutions are substantially different from the current ones, in a direction that clearly suggests that the damage caused by glaucoma can be reversed, in humans, and in the clinical setting.