Peripapillary atrophy (PPA) is an eye condition caused when certain tissues around the optic nerve become thinner. It rarely has any symptoms and is usually spotted during a regular eye examination. A diagnosis isn’t usually anything to worry about. It can be found in healthy individuals and isn’t usually a cause for concern.

2020年3月12日 · Regarding the reason for the location of PPA −BM (most PPA −BM is found at the temporal side of the ONH), possibly the concomitant nasal shifting of LC might cause the asymmetric stretching of ...

我们研究了高度近视眼中β-乳头旁萎缩（β-PPA）的微观结构与视神经乳头（ONH）和后极形态特征之间的关系。该研究包括八十九只高度近视的眼睛。Bruch的膜开口（BMO）区域，筛板（LC）厚度，前层深度，乳头周围和凹下脉络膜厚度（CT），黄斑Bruch膜（BM）长度以及有无Bruch膜（PPA +）的β-PPA宽度对BM ...

The areas of the optic nerve head (ONH) and PPA were measured on red-green and autofluorescence fundus images acquired by ultrawidefield retinal photography. The main outcome measure was the frequency of PPA. Correlations between the PPA/ONH ratio and disease duration, age, best corrected visual acuity (BCVA) and visual field results (mean ...

2021年1月12日 · Mean follow-up period was 38.1 ± 19.6 months (range, 12-88 months). Fifty-one eyes (43%) were classified as the ONH/PPA change group. In the ONH/PPA change group, HVDR decreased from the initial value of 0.92 ± 0.08 to the final value of 0.86 ± 0.11, and the PVDR increased from the initial value of 0.08 ± 0.07 to the final value of 0.20 ± ...

2021年4月7日 · The PPA is the surrounding area that marks the boundary of the ONH and the peripheral retina. Classically two types of PPA have been described: the α (alpha) and the β (beta) PPA (Fig. 1.3a ).

2012年7月3日 · Purpose: We compared the diagnostic ability of Stratus and Cirrus optical coherence tomography (OCT) in optic nerve head (ONH) analysis, and examined the effects of optic disc size and peripapillary atrophy (PPA) on their diagnostic capacity. Methods: Stratus and Cirrus OCT was performed in 28 control and 78 glaucomatous eyes. ONH parameters and diagnostic capacity calculated from the area ...

2017年11月16日 · Background Optic nerve head (ONH) and surrounding structures such as β-zone peripapillary atrophy (PPA) are important structures in glaucomatous pathogenesis. Thus, for understanding genetic components in glaucoma pathogenesis, it is necessary to evaluate the heritability of ONH and surrounding structures. The present study investigated the genetic influences on ONH and surrounding structures ...

2025年2月26日 · Aims This study aims to analyse peripapillary atrophy (PPA), its frequency, extent and relation with measures of visual function in patients with birdshot chorioretinitis (BSCR). Methods Patients of the single-centre prospective COhort of patients with BIRDshot chorioretinitis (ClinicalTrials.gov Identifier: [NCT05153057][1]) were included. The areas of the optic nerve head (ONH) and PPA were ...

Purpose.: We compared the diagnostic ability of Stratus and Cirrus optical coherence tomography (OCT) in optic nerve head (ONH) analysis, and examined the effects of optic disc size and peripapillary atrophy (PPA) on their diagnostic capacity. Methods.: Stratus and Cirrus OCT was performed in 28 control and 78 glaucomatous eyes. ONH parameters and diagnostic capacity calculated from the area ...