optic disc morphology
Optic disc morphology in unilateral branch retinal vein occlusion using spectral domain optical coherence tomography
... Glaucomatous optic disc changes may confound the relationship between BRVO and ONH parameters, therefore criteria for in- clusion were: intraocular pressure <22 mmHg, no evi- dence of glaucomatous ...
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Correlation of structural and functional measurements in primary open angle glaucoma (optic disc morphology and psychophysics)
... the disc (Schwartz et ...the disc overlying the lamina cribrosa, contrasting with the reddish pink o f the healthy neuroretinal rim ...the disc edge results in cupping with neuroretinal rim pallor 2 ...
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Segment of Blood Vessels and Optic Disc in the Fundus Retinal Images
... the optic disk is a very important structural indicator for evaluating the presence and extremity of retinal diseases like diabetic disease,high blood pressure, glaucoma, haemorrhages, vein occlusion and ...the ...
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Optic disc localization in retinal images using histogram matching
... localizing optic disc center of retina images without any pathological regions and exudates is ...existing optic disc in them is more than other regions in retina ...obtain optic ...
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A study of the causes of bilateral optic disc swelling in Japanese patients
... In the 21−50 age group, which contained the majority of the patients (62/121), an increased ICP was the leading cause of bilateral disc swelling, followed by pseudopapillitis, uveitis, and hypertensive ...
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Automatic Segmentation of Optic Disc in Eye Fundus Images: A Survey
... Obviously, the preprocessing techniques potentially lead to “faster” and “more accurate” results at the further segmentation stage. For instance, the fundus images in most of the presented algorithms were initially ...
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Locating the Optic Disc in Retinal Images Using Morphological Techniques
... DR is diagnosed by the examination of retinographies. This use of digital images of the retinal surface could be exploited for computerized early detection of DR. A robust system that enabled non-experts to filtrate ...
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Classification of Eye Diseases Using Optic Cup Segmentation and Optic Disc Ratio and Its Implementation Using VHDL
... the optic disc and the anterior segment and the abnormal growth of any geometry in the eye ...the optic disc are affected and this leads to progressive loss of ...using optic ...
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Membrane tissue on the optic disc may cause macular schisis associated with a glaucomatous optic disc without optic disc pits
... an optic nerve ...The optic nerve head was large (the disc-to- macula distance to disc diameter ratio was ...optic disc. Spectral domain OCT showed retinal schisis extending from ...
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Optic disc topography of normal tension glaucoma patients in Malaysia
... the optic disc topography in normal tension glaucoma (NTG) patients in Asian countries, especially in Southeast ...comparing optic disc topography in NTG patients and a control group in ...
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Optic Disc Boundary and Vessel Origin Segmentation of Fundus Images
... In this paper, we propose a novel three-step classification based OD segmentation algorith m that is robust to fundus images with vary ing FOV, illu minations and pathologies. For the first step, circular structuring ...
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<p>Optic disc pit maculopathy: tamponade of maculoschisis</p>
... Optic disc pit (ODP) maculopathy was fi rst described clinically in 1882 by Wiethe. 1 For more than a century thereafter, macular fl uid associated with ODP was referred to as macular detachment and was ...
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Automatic Detection of Optic disc in Eye Fundus Images A REVIEW
... ‘Optic Disc’ is commonly used to describe the portion of the optic nerve that is clinically visible on ...examination. Optic Disk is a small spot on the retinal surface of eye and is located ...
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Optic disc shape in patients with long-lasting unilateral esotropia and exotropia
... the optic nerve head and peripapillary ...the optic nerve head around the vertical axis, with a reversal of this pattern in abduction [12, ...the optic nerve on the optic nerve head in ...
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Clinical Reasoning: An unusual pattern of optic disc swelling and visual loss
... of optic disc swelling and a macular star (a ring of hard exudates in the macula), is usually due to infectious diseases such as cat- scratch disease, Lyme disease, syphilis, or toxoplas- ...anterior ...
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Optic Disc Drusen in a Child Diagnosed with Alport Syndrome—Case Report
... bilateral disc elevation that was worse on the right eye, and visual acuity of 6/6 and 6/60 on right and left eyes recorded ...bilateral optic disc drusen as the cause for his ...
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Optic Disc Size in Glaucoma Patients Attending a Tertiary Institution in Nigeria
... All subjects underwent a comprehensive ophthalmic examination which included a Snellen visual acuity test. Patients who couldn’t read 6/6 were refracted to rule out refractive errors then a direct ophthalmoscopy was done ...
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Clinical validation of a smartphone-based adapter for optic disc imaging in Kenya
... An experienced ophthalmic clinical officer or a lay technician with no healthcare background used a Samsung SIII GT- I9300 (Samsung C&T Corp., Seoul, Republic of Korea) and it’s native 8.0 Megapixel camera with the ...
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Automated Detection of New Vessels on the Optic Disc using Retinal Photography
... This paper focuses on the detection of new blood vessels on retina which are caused due to diabetic retinopathy. We have implemented the method for the detection of new blood vessels on retina which are caused due to ...
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Optic disc segmentation for glaucoma screening system using fundus images
... the optic disc (OD) is an important and essential step in creating a frame of reference for diagnosing optic nerve head pathologies such as ...of optic nerve head ...the disc boundaries ...
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