Peripapillary atrophy alpha beta zones

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WebFeb 25, 2012 · Studies show peripapillary atrophy may indicate glaucomatous optic neuropathy Primary Care Optometry News The appearance of the optic disc is often the most important sign clinicians … Webbeta zone extent although OCT was more accurate in the anatomical delineation of Bruch’s membrane and RPE termination. The nasal alpha and temporal beta zone extents could be taken as early indices for evaluating early glaucomatous optic neuropathy. Keywords Autoﬂuorescence Peripapillary atrophy Alpha zones Beta zone POAG Introduction

JCM Free Full-Text Anatomic Peculiarities Associated with Axial ...

WebSep 22, 2006 · Alpha zone and beta zone of peripapillary atrophy, respectively, occur in about 70 and 20%, respectively, of elderly Chinese. As peripapillary atrophy changes in glaucomatous optic... WebPurpose: To quantitatively analyze α-zone and β-zone peripapillary atrophy (PPA) in patients having early primary open-angle glaucoma (POAG) using fundus autofluorescence (FAF) … instrument outdated

Five-Year Follow-Up of Parapapillary Atrophy: The Beijing Eye Study

WebNov 29, 2010 · Colour photographs of the optic disc were taken and morphometrically assessed. Parapapillary atrophy was differentiated in a peripheral alpha zone characterized by an irregular pigmentation and a beta zone at the optic disc border, characterized by visible sclera and visible large choroidal vessels (Jonas et al. 1989; Wang et al. 2008). WebMay 15, 2002 · PPA refers to the atrophic-like changes that occur to the retina and choroid immediately adjacent to the optic nerve. Generally, there are two types, based on location … WebPeripapillary atrophy (PPA) is typically a lighter colored, well-demarcated crescent-shaped area on the temporal side of the optic nerve head and can be clinically divided into a central beta zone and peripheral alpha zone. 13 These two zones are not always present together. α-zone is characterized by a thinning and interruption of the retinal ... instrument oth

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Effects of Beta-zone Peripapillary Atrophy and Focal Lamina

WebMay 1, 2005 · Beta-zone peripapillary atrophy is one of several established morphologic features of glaucomatous optic neuropathy, and the progression of beta-peripapillary atrophy has been found... WebFeb 4, 2024 · The choroidal vascular network was imaged using OCTA, and the images underwent manual adjustments to determine the peripapillary atrophy (PPA)-β zone and microvascular dropout (MvD). The area of MvD and the PPA-β zone, spherical equivalent (SE), and axial length (AL) were collected and compared across groups. instrumentos musicais chinesesWebMay 7, 2012 · After qualitative assessment, the optic disc photographs were digitized and the optic disc structures were measured by outlining the borders of the optic disc, optic cup, peripapillary scleral ring, and alpha zone and beta zone of parapapillary atrophy border on the computer screen , . Parapapillary chorioretinal atrophy was divided into a ... jobe chaser 2

"WebMay 7, 2012 · Using optic disc photographs, we measured parapapillary atrophy which was divided into alpha zone and beta zone. Results Overall progression rate of alpha zone was seen in 0.6±0.1% (95% confidence interval (CI):0.3,0.9) of the subjects and of beta zone in 8.2±0.5% (95%CI:7.2,9.1) of the subjects. " - Peripapillary atrophy alpha beta zones

Peripapillary atrophy alpha beta zones

[PDF] Prevalence and Characteristics of Peripapillary Gamma Zone …

Web开馆时间：周一至周日7:00-22:30 周五 7:00-12:00; 我的图书馆 WebApr 29, 2024 · To quantitatively analyze α-zone and β-zone peripapillary atrophy (PPA) in patients having early primary open-angle glaucoma (POAG) using fundus Evaluation of …

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WebMar 1, 2013 · Optic nerve head anatomy in myopia and glaucoma, including parapapillary zones alpha, beta, gamma and delta: Histology and clinical features. ... Optic disc torsion, tilt, and peripapillary atrophy area were calculated in 2-dimensional disc photographs. The most posterior point—that is, the deepest point of the eye (DPE)—was identified in 3 ... WebConclusions: The alpha and beta zones of peripapillary atrophy did not enlarge markedly in patients after APAC, despite an enlargement of the optic cup during a follow up of four months. Publication types Research Support, Non-U.S. Gov't MeSH terms Acute Disease Aged Aged, 80 and over Female Glaucoma, Angle-Closure / complications* Humans

WebMar 1, 1996 · Reason for assessing beta zone only was that beta zone in contrast to alpha zone can easier be delineated, and that beta zone compared with alpha zone has a closer association with glaucoma.22,23 As already observed by Tezel and associates,7 assessing beta zone only might have led to a lower frequency of an enlargement of parapapillary … WebSep 1, 2012 · Parapapillary gamma zone (peripapillary sclera without overlying choroid, Bruch's membrane and deep retinal layers) was related with axial globe elongation and …

WebThe gamma zone is located between the beta zone (or the alpha zone in the case of an absence of a beta zone) on its peripheral side and the peripapillary ring on its central side. It is defined by the absence of BM. WebFeb 27, 2007 · The alpha and beta zones of peripapillary atrophy did not enlarge markedly in patients after APAC, despite an enlargement of the optic cup during a follow up of four months. Free full text . Br J Ophthalmol. 2007 Aug; …

WebOct 18, 2012 · Alpha zone was defined as irregular hyperpigmentation and hypopigmentation and it was located in the periphery of the parapapillary atrophy. Beta …

WebThe development of beta-zone peripapillary atrophy (β-PPA) and focal lamina cribrosa defect (FLD) was significantly associated with decreased peripapillary optical coherence … jobe cratesWebApr 1, 2024 · The superficial radial peripapillary capillary (RPC) and choroidal microvascular densities were delineated and measured in alpha, beta, and gamma zone PPA using OCT angiography,... instrumentos musicales herediaWeb开馆时间：周一至周日7:00-22:30 周五 7:00-12:00; 我的图书馆 jobe contractingWebResults: Beta-peripapillary atrophy was present in 58% of eyes developing GA and in 52% without GA (P = 0.17). The greater circumferential extent of sclera/choroidal blood vessels B-PPA in relation to the optic disk was associated with incident GA (P = 0.02) and the GA size at ﬁrst observation (P = 0.047). Beta-peripapillary atrophy was not ... jobe chronisterWebParapapillary atrophy has so far been differentiated into an alpha zone and a beta zone. 1 The alpha zone was defined as irregular hyperpigmentation and hypopigmentation and it … jobe christian singerWebparapapillary atrophy. Beta zone was characterized by visible sclera and visible large choroidal vessels and a location between the peripapillary scleral ring and alpha zone. … jobe compression hoseWebBased on clinical and histological studies, alpha and beta peripapillary atrophy zones (PPA) have been described in normal eyes, myopic eyes and eyes with glaucomatous optic … job editing cookbook