Results 11 to 20 of about 1,830,086 (308)

The optic nerve head in glaucoma. [PDF]

Community eye health, 2021
All types of glaucoma involve glaucomatous optic neuropathy. The key to detection and management of glaucoma is understanding how to examine the optic nerve head (ONH). This article addresses the following issues: \ud • How to examine the ONH\ud • Normal characteristics of the ONH\ud • Characteristics of a glaucomatous ONH\ud • How to tell if the ...
Bourne, Rupert R. A., Khatib, Tasneem
core   +5 more sources

Differences in optic nerve structure between individuals of predominantly African and European ancestry: Implications for disease detection and pathogenesis

Clinical Ophthalmology, 2008
Christopher A GirkinUniversity of Alabama at Birmingham School of Medicine, Birmingham, AL, USAAbstract: Glaucoma disproportionately affects individual of African ancestry. Additionally, racial differences in the optic nerve head have been well described
Christopher A Girkin
doaj   +1 more source

The optic nerve head in glaucoma.

Community eye health, 2006
All types of glaucoma involve glaucomatous optic neuropathy. The key to detection and management of glaucoma is understanding how to examine the optic nerve head (ONH).This article addresses the following issues:how to examine the ONHnormal characteristics of the ONHcharacteristics of a glaucomatous ONHhow to tell if the glaucomatous optic neuropathy ...
Rupert RA Bourne
openaire   +5 more sources

Pericytes in the optic nerve head. [PDF]

Prog Retin Eye Res
Pericytes are a unique population of contractile mural cells and are an essential part of the microvasculature. In the retina and brain, pericytes play crucial roles in regulating blood flow, maintaining the blood-brain barrier, signaling with neighboring cells, and depositing extracellular matrix.
Waxman S, Villafranca-Baughman D, Phillippi J, Jakobs TC, Alarcon-Martinez L, Di Polo A, Sigal IA.   +6 more
europepmc   +3 more sources

Optic Nerve Head Segmentation [PDF]

IEEE Transactions on Medical Imaging, 2004
Reliable and efficient optic disk localization and segmentation are important tasks in automated retinal screening. General-purpose edge detection algorithms often fail to segment the optic disk due to fuzzy boundaries, inconsistent image contrast or missing edge features.
James Lowell, Andrew Hunter, David H. Steel, Ansu Basu, Robert Ryder, Eric Fletcher, Lee Kennedy   +6 more
openaire   +4 more sources

TGF-beta(2)- and H2O2-Induced Biological Changes in Optic Nerve Head Astrocytes Are Reduced by the Antioxidant Alpha-Lipoic Acid [PDF]

, 2012
Background/Aims: The goal of the present study was to determine whether transforming growth factor-beta(2) (TGF-beta(2))- and oxidative stress-induced cellular changes in cultured human optic nerve head (ONH) astrocytes could be reduced by pretreatment ...
Yu, Alice L., Welge-Lussen, Ulrich, Moriniere, Jerome   +2 more
core   +1 more source

The Morphological Description Automation of the Optic Nerve Head Boundary in Digital Fundus Images

Oftalʹmologiâ, 2018
Purpose. To develop the automating method for the description of the optic nerve head condition. The method allows to differentiate the optic nerve head with clear boundaries typical for the normal fundus and optic nerve head with blurred boundaries ...
E. G. Tanaeva, R. G. Khafizov
doaj   +1 more source

Retinal Morphometric Indicators in Primary Hypothyroidosis and Primary Thyrotoxicosis

Oftalʹmologiâ, 2022
Purpose: to study the morphometric parameters of the retina in patients with primary hypothyroidism and primary thyrotoxicosis by optical coherence tomography.Materials and methods.
V. G. Likhvantseva, V. N. Trubilin, E. V. Korosteleva, S. G. Kapkova, V. A. Vygodin   +4 more
doaj   +1 more source

Optic Disc Melanocytoma Associated with Choroidal Neovascular Membrane: An Unusual Presentation [PDF]

Journal of Clinical and Diagnostic Research, 2018
Optic disc melanocytoma is a unilateral benign lesion of the optic nerve head, rarely causing visual disturbances. Vascular changes causing central retinal vein occlusion, compressive or mechanical effects of the mass over the optic nerve head can cause ...
Gladys Reshma Rodrigues, Teena Mariet Mendonca, Shobha G Pai, KS Amruthavalli   +3 more
doaj   +1 more source

Presumed Bietti crystalline dystrophy with optic nerve head drusen: a case report

Journal of Medical Case Reports, 2022
Background Bietti crystalline dystrophy is primarily a retinal dystrophy caused by a CYP4V2 mutation and typically presents with crystalline retinal deposits in the posterior fundus.
Fatemeh Bazvand, Esmaeil Asadi Khameneh
doaj   +1 more source