What Optic Nerve Head Conditions Mimic Glaucoma

Optic disc cupping is usually considered a hallmark of glaucoma, but it is not necessarily caused due to glaucoma. There are conditions which may manifest as ‘non-glaucomatous optic disc cupping’. It may not always be possible to distinguish glaucomatous from non-glaucomatous optic disc cupping based on the optic disc appearance alone. This chapter addresses some conditions that cause non-glaucomatous cupping and may mimic glaucoma and how a proper clinical examination always provides valuable clues to the diagnosis.