Abstract
The optic nerve head in highly myopic eyes is characterized by an enlargement of the optic nerve scleral canal and of the primary Bruch’s membrane opening; a thinning of the lamina cribrosa and thus a reduction in the distance between the intraocular compartment with intraocular pressure and the retrolaminar compartment with the orbital cerebrospinal fluid pressure; the development and enlargement of parapapillary zones gamma (defined as absence of Bruch’s membrane) and delta (markedly elongated and thinned peripapillary scleral flange); extension of the cerebrospinal fluid space just behind the thinned peripapillary scleral flange; a decreased spatial contrast between the height of the neuroretinal rim and the depth of the optic cup; a decreased color contrast between the pink of the rim and paleness of the cup; a decreased visibility of the retinal nerve fiber layer due to the bright fundus reflectance; and an increased susceptibility for glaucomatous optic nerve damage even in the presence of normal or low-normal intraocular pressure.
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Jonas, J.B. (2014). The Optic Nerve Head in High Myopia. In: Spaide, R., Ohno-Matsui, K., Yannuzzi, L. (eds) Pathologic Myopia. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8338-0_10
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DOI: https://doi.org/10.1007/978-1-4614-8338-0_10
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