Glaucoma is a disease of the optic nerve, characterised by a specific pattern of progressive injury to retinal ganglion cells and their axons, which results in the alteration of optic disc topography, commonly known as “cupping”, and associated with visual field loss. Glaucoma is, therefore, a disease that is defined, staged, longitudinally assessed, and treated on the basis of structural appearance of the optic nerve and its function1 . Most glaucoma patients show slow progression of structure and function over many years.
However, a subset of glaucoma patients will demonstrate fast progression and are at risk of significant visual disability or blindness. To reduce the probability of visual disability, clinicians after diagnosing glaucoma and initiating treatment, should focus primarily on whether the disease is stable or whether there are progressive changes that require an increase…
