scholarly journals Validation of formula-predicted glaucomatous optic disc appearances: the Glaucoma Stereo Analysis Study

2018 ◽  
Vol 97 (1) ◽  
pp. e42-e49 ◽  
Author(s):  
Masaki Tanito ◽  
Koji Nitta ◽  
Maki Katai ◽  
Yasushi Kitaoka ◽  
Yu Yokoyama ◽  
...  
Keyword(s):  
Optic Disc ◽  
Analysis Study ◽  
Stereo Analysis

scholarly journals Differentiation of glaucomatous optic discs with different appearances using optic disc topography parameters: The Glaucoma Stereo Analysis Study

PLoS ONE ◽  
2017 ◽  
Vol 12 (2) ◽  
pp. e0169858 ◽  
Author(s):  
Masaki Tanito ◽  
Koji Nitta ◽  
Maki Katai ◽  
Yasushi Kitaoka ◽  
Yu Yokoyama ◽  
...  
Keyword(s):  
Optic Disc ◽  
Analysis Study ◽  
Stereo Analysis ◽  
Optic Discs

scholarly journals Comparisons between retinal vessel calibers and various optic disc morphologic parameters with different optic disc appearances: The Glaucoma Stereo Analysis Study

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0250245
Author(s):  
Kazunobu Sugihara ◽  
Yasuyuki Takai ◽  
Ryo Kawasaki ◽  
Koji Nitta ◽  
Maki Katai ◽  
...  
Keyword(s):  
Visual Field ◽  
Optic Disc ◽  
Collaborative Study ◽  
Retinal Vessel ◽  
Analysis Study ◽  
Stereo Analysis ◽  
Fundus Photographs ◽  
Retinal Arteriolar ◽  
Central Retinal Arteriolar Equivalent ◽  
Central Retinal Venular Equivalent

The Glaucoma Stereo Analysis Study (GSAS) is a multicenter collaborative study of the characteristics of glaucomatous optic disc morphology using a stereo fundus camera. This study evaluated the retinal vessel calibers and correlations using GSAS fundus photographs between retinal vessels and 38 optic nerve head (ONH) morphologic parameters comprehensively. In all 240 eyes, the mean central retinal arteriolar equivalent (CRAE) and central retinal venular equivalent (CRVE) were 138.4 and 216.5 μm, respectively; the CRAE correlated with age, visual field scores and 19 ONH parameters and CRVE correlated with age, intraocular pressure, visual field scores and 11 ONH parameters. Among the different optic disc appearances including focal ischemia (FI) (n = 53, 22%), generalized enlargement (GE) (n = 53, 22%), myopic glaucoma (MY) (n = 112, 47%), and senile sclerosis (SS) (n = 22, 9%), the CRAE did not differ significantly; CRVE was significantly narrower in SS than in FI and MY. In FI, GE, MY, and SS disc types, CRAE correlated with 3, 14, 9, and 2 ONH parameters, respectively, and CRVE corelated with 9, 0, 12, and 6 ONH parameters, respectively. We confirmed previous observations on the effect of retinal vessel narrowing on glaucomatous changes in the ONH and visual field. The associations between retinal vessel caliber and ONH morphologic parameters vary among different optic disc appearances, suggesting different effects of vascular changes in each disc type.

scholarly journals A Small Disc Area Is a Risk Factor for Visual Field Loss Progression in Primary Open-Angle Glaucoma: The Glaucoma Stereo Analysis Study

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Yasushi Kitaoka ◽  
Masaki Tanito ◽  
Yu Yokoyama ◽  
Koji Nitta ◽  
Maki Katai ◽  
...  
Keyword(s):  
Visual Field ◽  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Visual Field Loss ◽  
Morphological Parameters ◽  
Open Angle ◽  
Analysis Study ◽  
Visual Field Progression ◽  
Stereo Analysis ◽  
Disc Area

Purpose. The Glaucoma Stereo Analysis Study, a cross-sectional multicenter collaborative study, used a stereo fundus camera (nonmyd WX) to assess various morphological parameters of the optic nerve head (ONH) in glaucoma patients. We compared the associations of each parameter between the visual field loss progression group and no-progression group. Methods. The study included 187 eyes of 187 patients with primary open-angle glaucoma or normal-tension glaucoma. We divided the mean deviation (MD) slope values of all patients into the progression group (<−0.3 dB/year) and no-progression group (≧−0.3 dB/year). ONH morphological parameters were calculated with prototype analysis software. The correlations between glaucomatous visual field progression and patient characteristics or each ONH parameter were analyzed with Spearman’s rank correlation coefficient. Results. The MD slope averages in the progression group and no-progression group were −0.58 ± 0.28 dB/year and 0.05 ± 0.26 dB/year, respectively. Among disc parameters, vertical disc width (diameter), disc area, cup area, and cup volume in the progression group were significantly less than those in the no-progression group. Logistic regression analysis revealed a significant association between the visual field progression and disc area (odds ratio 0.49/mm2 disc area). Conclusion. A smaller disc area may be associated with more rapid glaucomatous visual field progression.

scholarly journals Estimation of the Disc Damage Likelihood Scale in primary open-angle glaucoma: the Glaucoma Stereo Analysis Study

2015 ◽  
Vol 254 (3) ◽  
pp. 523-528 ◽  
Author(s):  
Yasushi Kitaoka ◽  
Masaki Tanito ◽  
Yu Yokoyama ◽  
Koji Nitta ◽  
Maki Katai ◽  
...  
Keyword(s):  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Open Angle ◽  
Analysis Study ◽  
Stereo Analysis

scholarly journals Stereoscopic Analysis of Optic Nerve Head Parameters in Primary Open Angle Glaucoma: The Glaucoma Stereo Analysis Study

PLoS ONE ◽  
2014 ◽  
Vol 9 (6) ◽  
pp. e99138 ◽  
Author(s):  
Yu Yokoyama ◽  
Masaki Tanito ◽  
Koji Nitta ◽  
Maki Katai ◽  
Yasushi Kitaoka ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Optic Nerve Head ◽  
Primary Open Angle Glaucoma ◽  
Open Angle Glaucoma ◽  
Open Angle ◽  
Analysis Study ◽  
Stereo Analysis

A cluster analysis study onCinnamomum from Kerala, India

1991 ◽  
Vol 102 (3-4) ◽  
pp. 167-175
Author(s):  
Shylaja Ravindran ◽  
R. Balakrishnan ◽  
K. S. Manilal ◽  
P. M. Ravindran
Keyword(s):  
Cluster Analysis ◽  
Analysis Study
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