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The funduscopic parapapillary beta zone defined by visible choroidal vessels and the sclera has been put forward for about 30 years (1). With the application of spectral domain optical coherence tomography (SD-OCT), the funduscopic beta zone has recently been divided into 2 subzones: gamma zone and (new) beta zone (2,3). Parapapillary gamma zone was defined as the peripapillary region free of Bruch’s membrane (BM), and the (new) parapapillary beta zone was defined by the continued presence of BM and absence of retinal pigment epithelial. Several studies have shown that parapapillary beta zone Original Article

Microstructural features of parapapillary gamma zone and beta zone in non-myopic eyes