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Specialty: Opthalmology

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Total 380 results found since Jan 2013.

Retinal Structural and Microvascular Alterations in Different Acute Ischemic Stroke Subtypes.
Discussion. Compared with superficial microvascular network, deep microvascular network is more sensitive to ischemic stroke. In addition, we have demonstrated quadrant-specific pRNFL abnormalities in LAA and SAA patients. Superior quadrant pRNFL thickness differences between stroke subgroups may suggest that changes in retinal nerve fiber layer are more sensitive to subtype identification than changes in retinal microvascular structure. All in all, the alteration in retinal structural and microvascular may further elucidate the role of the neovascular unit in ischemic stroke, suggesting that the combination of these two i...
Source: Journal of Ophthalmology - January 27, 2021 Category: Opthalmology Tags: J Ophthalmol Source Type: research

Number of flankers influences foveal crowding and contour interaction differently.
Abstract Nearby flanking objects degrade visual resolution. If the flankers are similar to the acuity target, this influence is called crowding (CW), whereas if the flanking stimuli are simple bars then the phenomenon is known as contour interaction (CI). The aim of this study was to compare the influence of the number and position of flankers on foveal CW and CI to investigate possible differences in mechanism of these two effects. Five normal observers viewed single, foveally presented Sloan letters surrounded by 1, 2 or 4 flankers (either a Sloan letter or one-stroke-width bars), presented at several edge-to-ed...
Source: Vision Research - November 30, 2020 Category: Opthalmology Authors: Pluháček F, Musilová L, Bedell HE, Siderov J Tags: Vision Res Source Type: research

Secondary Stroke Prevention and Management for the Neuro-Ophthalmologist
Conclusions: The optimal treatment to prevent stroke recurrence is determined by the etiology of stroke. After stroke workup, patients will typically be placed on proper medical therapy for the appropriate duration in addition to counseling on lifestyle modifications to reduce the risk of recurrent strokes. For complex patients, it is reasonable for providers to consider patient referral to stroke specialists for further aid in selection of appropriate medical therapy.
Source: Journal of Neuro-Ophthalmology - November 22, 2020 Category: Opthalmology Tags: Disease of the Year 2020: Cerebrovascular Disorders Source Type: research

Catastrophic Allergic Fungal Sinusitis: A Report of Two Cases
Conclusions: Although AFRS is most often benign and treatable, it may rarely produce catastrophic outcomes, especially if the sphenoid sinus is involved. Irreversible vision loss may occur from compression, and ocular motor palsies and death from conversion to invasive fungal disease. Close ophthalmologic and imaging monitoring is necessary in patients with expanded sinuses, and prophylactic sinus surgery may be indicated in certain cases.
Source: Journal of Neuro-Ophthalmology - November 22, 2020 Category: Opthalmology Tags: Original Contribution Source Type: research

Stroke Rate, Subtype, and Cardiovascular Risk Factors in Nonarteritic Anterior Ischemic Optic Neuropathy: A Population-Based Study
Conclusions: NAION does not confer an increased risk of symptomatic stroke beyond the risk posed by age and existing vascular risk factors.
Source: Journal of Neuro-Ophthalmology - August 25, 2020 Category: Opthalmology Tags: Clinical Research: Epidemiology Meets Neuro-Ophthalmology Source Type: research

Thrombolysis for Central Retinal Artery Occlusion in 2020: Time Is Vision!
Conclusions: In 2020, nonarteritic CRAO patients should theoretically receive the same thrombolytic therapies, in the same time window, as patients with acute cerebral ischemia. Eye stroke and teleeye stroke code encounters must include an expert ophthalmologic evaluation to confirm the correct diagnosis and to evaluate for ocular signs that may help guide IV tPA administration or IA management. Future research should focus on developing feasible retinal penumbra imaging studies that, similar to cerebral tissue viability or perfusion imaging, can be incorporated into the thrombolysis decision-making algorithm.
Source: Journal of Neuro-Ophthalmology - August 25, 2020 Category: Opthalmology Tags: Disease of the Year: Cerebrovascular Disorders Source Type: research

Causes of Horner Syndrome: A Study of 318 Patients
Conclusions: The prevalence of causes of Horner syndrome depends on the accrual method. Among pharmacologically-confirmed cases, the cause was often undetermined or due to a preceding neck or chest procedure. Among pharmacologically-unconfirmed cases, a substantial proportion had also been caused by neck and chest procedures, but tumors in that region were also common. When a cause of Horner syndrome was found in both cohorts, it was usually known before Horner syndrome was discovered, making Horner syndrome an afterthought. However, in an important minority of cases where the cause was not yet known, the identification ...
Source: Journal of Neuro-Ophthalmology - August 25, 2020 Category: Opthalmology Tags: Original Contribution Source Type: research

Dizziness and Vertigo: The Skillful Examination
Conclusion: By applying a methodical approach to examination of patients with dizziness and vertigo, localization of the offending lesion, management, and even elucidation of the underlying diagnosis is feasible.
Source: Journal of Neuro-Ophthalmology - August 25, 2020 Category: Opthalmology Tags: Trainees' Corner Source Type: research

Saturday night retinopathy: A French case of post-compressive CRAO.
We report herein the first French case of Saturday Night Retinopathy. A 39-year-old man presented to the emergency room with unilateral vision loss in the left eye with redness but no pain. Visual acuity OS was "light perception" and OD 20/20. The left eye was hyperemic with a fixed, dilated pupil; fundus examination revealed a macular cherry-red spot within a pale, ischemic retina. The patient was admitted to a stroke centre. The neurological work-up and head CT were normal. He also underwent evaluation for possible carotid or cardiac etiologies, all of which were negative. Current smoking was the only cardiovascular risk...
Source: Journal Francais d Ophtalmologie - August 20, 2020 Category: Opthalmology Tags: J Fr Ophtalmol Source Type: research

Arterial Occlusions to the Eye: From Retinal Emboli to Ocular Ischemic Syndrome
The objective of this review article is to provide the general ophthalmologists with information on how to recognize the symptoms and to best manage these patients. The management is to investigate for the cause of the transient monocular visual loss and to apply secondary prevention to address atherosclerotic risk factors to prevent further ischemic events like a stroke.
Source: Asia-Pacific Journal of Ophthalmology - July 1, 2020 Category: Opthalmology Tags: Review Article Source Type: research

Transvenous embolization of bilateral indirect carotid-cavernous fistulas via aunilateral transorbital approach.
Abstract A 73-year-old man with a complex ophthalmologic history presented with several weeks of worsening diplopia, visual acuity, and proptosis bilaterally. Cerebral angiography demonstrated bilateral indirect Barrow type B carotid-cavernous fistulas (CCFs). Transarterial embolization was not attempted due to small arterial diameter and risk of stroke. Multiple attempts were made to access the fistula via a transfemoral venous approach and were unsuccessful. A transorbital puncture was performed, which allowed access to both cavernous sinuses via a unilateral approach. After embolization with Onyx, there was no ...
Source: Orbit - June 18, 2020 Category: Opthalmology Authors: Laplant JF, Lim LH, Dumont AS, Nerva JD Tags: Orbit Source Type: research

Vision-Related Quality of Life, Anxiety and Depression in Congolese Patients with Polypoidal Choroidal Vasculopathy.
CONCLUSIONS: PCV impairs the QoL and induces both anxiety and depression in Congolese PCV patients. Screening for QoL, anxiety and depression in PCV patients at first presentation will help detect those in need of psychological support. PMID: 32507004 [PubMed - as supplied by publisher]
Source: Seminars in Ophthalmology - June 10, 2020 Category: Opthalmology Tags: Semin Ophthalmol Source Type: research

Cardiovascular risk in patients receiving ranibizumab for exudative age-related macular degeneration: a nationwide self-controlled case-series study.
CONCLUSIONS: Ranibizumab intravitreal injections did not increase the overall risk of stroke or AMI. Although the cardiovascular risk in patient receiving ranibizumab seems to be low, continuous monthly use of ranibizumab for high-risk patients should be judged carefully. PMID: 32522792 [PubMed - as supplied by publisher]
Source: The British Journal of Ophthalmology - June 9, 2020 Category: Opthalmology Authors: Jeon HL, Byun SJ, Pratt NL, Sultana J, Park SJ, Shin JY Tags: Br J Ophthalmol Source Type: research

Episodic Visual Distortions and Stroke-Like Symptoms in a 56-Year-Old Man With Intravascular Lymphoma
Abstract: A healthy 56-year-old man presented with vision changes and left upper extremity motor and sensory changes. MRI of the brain without contrast was significant for multifocal areas of restricted diffusion in multiple vascular territories. Neuro-Ophthalmic evaluation revealed an inferonasal visual field defect in the left eye, thickened choroid on optical coherence tomography, and bilateral delayed arteriovenous and choroidal filling on fluorescein angiogram. Repeat MRI demonstrated interval enlargement of many of the same foci of abnormal diffusion-weighted imaging signal. Computed tomography of the abdomen and p...
Source: Journal of Neuro-Ophthalmology - May 19, 2020 Category: Opthalmology Tags: Clinical-Pathological Case Study Source Type: research

Checkerboard Visual Field Defect in Occipital Stroke
Abstract: A 74-year-old man with vasculopathic risk factors presented to the emergency room with a chief complaint of peripheral vision loss resulting from an intracranial hemorrhage in his right parietal and occipital lobes. Urgent craniotomy and ventriculostomy led to a stable clinical condition with subsequent development of a crossed quadrant homonymous hemianopsia (checkerboard visual field) due to a new right parieto-occipital infarct superimposed on a prior left occipital infarct. This uncommon visual field defect represents juxtaposed homonymous quadrantanopias that produce a striking checkerboard appearance that...
Source: Journal of Neuro-Ophthalmology - May 19, 2020 Category: Opthalmology Tags: Trainees' Corner Source Type: research