keyword
https://read.qxmd.com/read/34244380/vision-loss-in-giant-cell-arteritis
#21
REVIEW
Laura Donaldson, Edward Margolin
Almost two-thirds of patients with giant cell arteritis (GCA) develop ocular symptoms and up to 30% suffer permanent visual loss. We review the three most common mechanisms for visual loss in GCA, describing the relevant ophthalmic arterial anatomy and emphasising how ophthalmoscopy holds the key to a rapid diagnosis. The short posterior ciliary arteries supply the optic nerve head, while the central retinal artery and its branches supply the inner retina. GCA has a predilection to affect branches of posterior ciliary arteries...
April 2022: Practical Neurology
https://read.qxmd.com/read/34232212/heart-rhythm-synchronized-fibrin-flap-in-a-glaucoma-tube-shunt-the-heartbeat-acts-as-a-drainage-pump-for-the-aqueous-humor-a-case-report
#22
JOURNAL ARTICLE
Hirotaka Tanabe, Shunsuke Nakakura, Hitoshi Tabuchi
RATIONALE: The amount of aqueous humor that is constantly produced by the ciliary processes and the equal amount that flows out through the trabecular meshwork via the drainage angle or through the uveoscleral route is very small (2-3 μg/min each), representing approximately 1% of the content of the anterior chamber; therefore, it is challenging to visualize its flow. PATIENT CONCERNS: A 69-year-old man who had high intraocular pressure (IOP) (>20 mm Hg) with the maximum glaucoma eyedrop dose and presented with severe visual field loss (Humphrey Field Analyzer 30-2: -26...
July 9, 2021: Medicine (Baltimore)
https://read.qxmd.com/read/34145480/peripapillary-vascular-density-in-resolved-non-arteritic-anterior-ischemic-optic-neuropathy-colocalization-between-structural-and-vascular-parameters
#23
JOURNAL ARTICLE
Mariapaola Giordano, Daniela Montorio, Marina Concilio, Vincenzo Brescia Morra, Gilda Cennamo
INTRODUCTION/AIMS: Non-arteritic anterior ischemic optic neuropathy (NAION) is an acute infarction of the prelaminar anterior optic disc, resulting from the occlusion of posterior ciliary arteries. Here, we evaluated the correlation between structural and vascular features in a case of resolved NAION. METHODS: Observational case report. RESULTS: A 50-year-old male patient was referred at an Eye clinic due to an altitudinal visual field defect in the left eye, occurred 9 months before...
June 18, 2021: Neurological Sciences
https://read.qxmd.com/read/34108782/eosinophilic-granulomatosis-with-polyangiitis-presenting-as-unilateral-acute-anterior-ischaemic-optic-neuropathy
#24
Anthony Fong, Shahzada Ahmed, Satheesh Ramalingam, Rachel M Brown, Lorraine Harper, Susan P Mollan
Eosinophilic granulomatosis with polyangiitis (eGPA) is a rare vasculitis of small-medium sized vessels that can cause both anterior and posterior ischaemic optic neuropathies. Herein, the authors present a rare case of eGPA presenting initially as an acute unilateral anterior ischaemic optic neuropathy from short posterior ciliary artery vasculitis. The diagnosis presented a challenge as clinical and histopathological evidence suggested allergic rhinosinusitis, and no invasive fungal sinusitis was found. The high serum eosinophilia, asthma, optic neuropathy and paranasal sinus abnormalities fulfilled the criteria for a diagnosis of eGPA...
2021: Neuro-ophthalmology
https://read.qxmd.com/read/33936976/evaluation-of-hemodynamic-changes-in-nonarteritic-anterior-ischemic-optic-neuropathy-using-multimodality-imaging
#25
JOURNAL ARTICLE
Hongyang Li, Jiao Sun, Huihui Wang, Yanling Wang, Zhenchang Wang, Jing Li
Background: Nonarteritic anterior ischemic optic neuropathy (NAION) patients experience hypo-perfusion in the short posterior ciliary arteries (SPCAs), however, the cause of hypo-perfusion is unclear. Real-time dynamic hemodynamic observations may provide clues into specific NAION pathogenic mechanisms. We aim to analyze hemodynamic changes occurring in NAION using multimodality imaging. Our specific focus is identifying pathogenic mechanisms underlying SPCA insufficiency in NAION. Methods: Three-dimensional arterial spin labeling (3D ASL) magnetic resonance imaging (MRI) and three-dimensional time-of-flight (3D-TOF) magnetic resonance angiography (MRA) were performed on 25 NAION patients (50 eyes) and 22 (44 eyes) normal cases were recruited...
May 2021: Quantitative Imaging in Medicine and Surgery
https://read.qxmd.com/read/33930579/anterior-ischemic-optic-neuropathy-and-cilioretinal-artery-occlusion-secondary-to-polyarteritis-nodosa-a-case-report
#26
Hidayet Sener, Duygu Gulmez Sevim, Metin Unlu
INTRODUCTION: Polyarteritis nodosa is a systemic vasculitis characterized by necrotizing inflammatory lesions affecting the middle and small arteries. CASE PRESENTATION: A 23-year-old male presented to our ophthalmology clinic with a 1-day history of sudden vision loss in his left eye. Posterior segment examination the left eye showed optic disc borders were faint, hyperemic and fluffy with cilioretinal artery occlusion signs present. Optical coherence tomography revealed the presence of localized intracellular edema from optic disc to superior-hemi of fovea, including fovea...
April 27, 2021: Photodiagnosis and Photodynamic Therapy
https://read.qxmd.com/read/33463564/giant-cell-arteritis-its-ophthalmic-manifestations
#27
REVIEW
Sohan Singh Hayreh
Giant cell arteritis (GCA) is the most important medical emergency in ophthalmology, because its most dreaded complication is visual loss, which is preventable if these patients are diagnosed early and treated immediately and aggressively. This is a brief review of GCA, its ophthalmic manifestations, and how to diagnose and manage them.
February 2021: Indian Journal of Ophthalmology
https://read.qxmd.com/read/33344194/imageology-of-internal-carotid-artery-siphon-in-non-arteritic-anterior-ischaemic-optic-neuropathy
#28
JOURNAL ARTICLE
Zhi-Yong Fu, Hong-Yang Li, Yan-Ling Wang
AIM: To evaluate whether narrowing of internal carotid artery siphon (ICAS) may increase the risk of developing non-arteritic anterior ischaemic optic neuropathy (NAION). METHODS: Totally 30 consecutive patients who had unilateral NAION and 30 gender-matched control subjects were recruited in the present study. The diameter of ICAS of all the participants were measured using head-and-neck computed tomographic angiography (CTA). Color doppler flow imaging (CDI) was used to measure the haemodynamics parameters of ICAS and short posterior ciliary arteries (SPCAs) in all subjects...
2020: International Journal of Ophthalmology
https://read.qxmd.com/read/33307804/oct-angiography-analysis-in-acute-non-arteritic-anterior-ischemic-optic-neuropathy-the-importance-of-segmentation
#29
JOURNAL ARTICLE
Marie-Benedicte Rougier, Sarra Gattoussi, Melanie Le-Goff, Jean Francois Korobelnik
BACKGROUND: In non-arteritic anterior ischemic optic neuropathy (NAION), optical coherence tomography angiography (OCTA) shows changes in peripapillary vascularization. However, the presence of an optic disc edema may induce artifacts that prevent visualizing the peripapillary network. The aim of this study was to evaluate the peripapillary vascularization in acute NAION using swept-source OCTA algorithms allowing segmenting only the retinal nerve fiber layer (RNFL). METHODS: Retrospective analysis of 15 eyes with acute NAION of 15 patients...
December 14, 2020: European Journal of Ophthalmology
https://read.qxmd.com/read/33057108/efficacy-of-systemic-administration-of-riboflavin-on-a-rabbit-model-of-corneal-alkali-burn
#30
JOURNAL ARTICLE
Maksym Żuk, Ekaterina Lobashova, Olga Żuk, Sławomir Wierzba
Changes in the barrier mechanisms in the eye should determine the rational route for the administration and dosage of each drug in the treatment of traumatic injuries and other pathologies. The aim of this study was to examine the efficacy of intra-arterial delivery of 14 C-riboflavin (as an "indicator") and compare it with intravenous and intramuscular administration in an animal model of chemical eye burn. 14 C-riboflavin (14 C-I) was administered by intra-arterial (carotid artery), intravenous (femoral vein) and intramuscular (femoral muscle) routes...
October 14, 2020: Scientific Reports
https://read.qxmd.com/read/32818333/cloudy-complication-management-of-an-opacified-intraocular-lens-and-diffuse-iris-transillumination-defects-august-consultation-1
#31
JOURNAL ARTICLE
(no author information available yet)
A 76-year-old man with a medical history of type 2 diabetes, hypercholesterolemia, and coronary artery disease presented with blurred vision in the right eye. His ocular history was significant for cataract surgery with posterior chamber intraocular lens (PC IOL) implantation in both eyes 3 years prior to presentation. His specific ocular complaints included blurred vision, whiteout visual episodes lasting 20 minutes, and intractable glare in the right eye. Of note, the patient was on anticoagulation therapy due to a history of stroke...
August 2020: Journal of Cataract and Refractive Surgery
https://read.qxmd.com/read/32775330/association-study-of-mthfr-polymorphisms-with-nonarteritic-anterior-ischemic-optic-neuropathy-in-a-spanish-population
#32
JOURNAL ARTICLE
Beatriz Fernández-Vega, Lydia Álvarez, Montserrat García, Enol Artime, Marta Diñeiro Soto, Javier Nicieza, José A Vega, Héctor González-Iglesias
INTRODUCTION: Nonarteritic anterior ischemic optic neuropathy (NAION), painless loss of central and/or peripheral vision, is a multifactorial disease caused by insufficient blood flow through the posterior ciliary arteries to the optic nerve head. Mutations in the methylenetetrahydrofolate reductase ( MTHFR ) gene, triggering hyperhomocysteinemia as a consequence of a decreased activity of the codified enzyme, have been considered to be among the risk factors of NAION. OBJECTIVE: The main aim was to study the association of the most common MTHFR genetic polymorphisms C677T and A1298C with NAION in a Spanish population...
2020: Biomedicine Hub
https://read.qxmd.com/read/32695931/congenital-isolated-idiopathic-episcleral-arteriovenous-malformation
#33
Aastha Gandhi, Mayuresh Naik, Anuj Mehta
Purpose: To report the occurrence of an episcleral AVM and to discuss the gravity as well as management of dilated tortuous episcleral vasculature. Observation: A 16-year-old Asian male presented with redness in the left eye since birth and a history of gradual painless progressive increase in size since the past two years, causing a cosmetic concern for the patient. There was no history of any diminution of vision, diplopia, headache, trauma or any similar lesions anywhere in the body...
September 2020: American Journal of Ophthalmology Case Reports
https://read.qxmd.com/read/32595922/ultra-wide-field-angiography-documented-peripheral-retinal-eovascularization-as-cause-of-vitreous-hemorrhage-after-scleral-buckle-surgery
#34
Moises Enghelberg, K V Chalam
We describe an unusual case of ultra wide fluorescein angiography (UWFA) documented peripheral retinal neovascularization (NVE) with delayed vitreous hemorrhage after placement of an encircling scleral buckle (a common procedure for repair of retinal detachment). Anterior segment ischemia is a rare complication after scleral buckle surgery for the treatment of retinal detachment and results from altered choroidal flow through the impingement of the anterior and long posterior ciliary arteries. UWFA performed for the evaluation of vitreous hemorrhage confirmed ischemia anterior to the scleral buckle and consequential NVE...
June 2020: Journal of Surgical Case Reports
https://read.qxmd.com/read/32590524/the-functional-anatomy-of-the-ophthalmic-angiosome-and-its-implications-in-blindness-as-a-complication-of-cosmetic-facial-filler-procedures
#35
JOURNAL ARTICLE
G Ian Taylor, Sajna Shoukath, Adam Gascoigne, Russell J Corlett, Mark W Ashton
BACKGROUND: Blindness following facial filler procedures, although rare, is devastating, usually acute, permanent, and attributed to an ophthalmic artery embolus. However, blindness may be delayed for up to 2 weeks, sometimes following injection at remote sites, suggesting alternative pathways and pathogenesis. METHODS: Seeking solutions, fresh cadaver radiographic lead oxide injection, dissection, and histologic studies of the orbital and facial pathways of the ophthalmic angiosome, performed by the ophthalmic artery and vein, both isolated and together, and facial artery perfusions, were combined with total body archival arterial and venous investigations...
October 2020: Plastic and Reconstructive Surgery
https://read.qxmd.com/read/32434799/initial-experience-with-the-scepter-mini-dual-lumen-balloon-for-transophthalmic-artery-embolization-of-anterior-cranial-fossa-dural-arteriovenous-fistulae
#36
JOURNAL ARTICLE
Benjamin Pulli, Eric S Sussman, Vera Mayercik, Gary K Steinberg, Huy M Do, Jeremy J Heit
BACKGROUND: Precise delivery of liquid embolic agents (LEAs) remains a challenge in the endovascular treatment of dural arteriovenous fistulae (dAVFs) and cerebral arteriovenous malformations (cAVMs). Despite significant advances in the past decade, LEA reflux and catheter navigability remain shortcomings of current endovascular technology, particularly in small and tortuous arteries. The Scepter Mini dual-lumen balloon microcatheter aims to address these issues by decreasing the distal catheter profile (1...
November 2020: Journal of Neurointerventional Surgery
https://read.qxmd.com/read/32399414/retinal-vascular-diameter-changes-assessed-with-a-computer-assisted-software-after-strabismus-surgery
#37
JOURNAL ARTICLE
Jin-Qiong Zhou, Jing Fu, Ji-Peng Li, Xiao-Zhen Wang, Wen-Ying Wang, Bo-Wen Zhao, Meng Qi
AIM: To quantitatively investigate the retinal vascular diameter changes, analyzing the early and long-term effects on the retinal circulation, with 6-month follow-up. METHODS: Patients underwent horizontal strabismus surgery were enrolled prospectively. Retinal vessel diameters on color fundus photographs were assessed before and 1, 7d, 6mo after surgery, using a computer-assisted quantitative assessment software. To evaluate the retinal vascular caliber changes, retinal vascular diameters were calculated by means of the Parr-Hubbard formula as the central retinal arteriolar equivalent (CRAE) and central retinal venular equivalent (CRVE)...
2020: International Journal of Ophthalmology
https://read.qxmd.com/read/32187948/-morphological-observation-on-the-anterior-ciliary-vessels-in-the-horizontal-rectus-muscles-of-patients-with-concomitant-horizontal-strabismus
#38
JOURNAL ARTICLE
M H Pan, M Yang
Objective: To observe the number of blood vessels and the anatomical characteristics of the anterior ciliary vessels (ACVs) in the horizontal rectus muscles of patients with concomitant horizontal strabismus. Methods: Cross-sectional study. From July 2016 to September 2019 patients with concomitant horizontal strabismus treated by realignment surgeries in Xiamen Eye Center of Xiamen University were included. Patients who had previous operations on eyes were excluded. The high resolution surgical imaging of ACVs in the horizontal rectus muscles was performed during operation...
March 11, 2020: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://read.qxmd.com/read/31976346/ocular-accommodation-intraocular-pressure-development-of-myopia-and-glaucoma-role-of-ciliary-muscle-choroid-and-metabolism
#39
JOURNAL ARTICLE
Karan R Gregg Aggarwala
Ocular accommodation is not just a mechanism for altering curvature of the crystalline lens of the eye, it also enables aqueous humor outflow through the trabecular meshwork, influencing intraocular pressure (IOP). Long term stress on the ciliary muscle from sustained near focusing may initiate myopic eye growth in children and primary open angle glaucoma in presbyopic adults. Multi-factorial studies of ocular accommodation that include measures of IOP, ciliary muscle morphology, anterior chamber depth and assessment of nutritional intake and metabolic markers may elucidate etiology and novel strategies for management of both myopia and chronic glaucoma...
2020: Medical Hypothesis, Discovery and Innovation in Ophthalmology
https://read.qxmd.com/read/31895731/adult-primary-capillary-hemangioma-of-the-sclera-a-previously-undescribed-entity-with-a-review-of-epibulbar-vascular-lesions
#40
JOURNAL ARTICLE
Frederick A Jakobiec, Mehenaz Hanbazazh, Paula Cortes Barrantes, James Chodosh
PURPOSE: The objective of this article is to document a unique case of a primary hemangioma and review epibulbar vascular tumors of the conjunctiva and episclera. METHODS: A case report with detailed histopathologic, histochemical, and immunohistochemical studies coupled with a comprehensive review of the relevant literature with a tabulation of previously reported epibulbar vascular lesions was performed. RESULTS: A vascular tumor developed in a 46-year-old woman over 2-3 months that histopathologically was located in the superficial third of the normally avascular sclera and was composed of capillary caliber vessels...
December 31, 2019: Ophthalmic Plastic and Reconstructive Surgery
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