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Specialty: Opthalmology

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Total 380 results found since Jan 2013.

The Effects of Visual Field Loss from Stroke on Performance in a Driving Simulator
CONCLUSIONS In this large cohort, driver safety could not be predicted from the type of homonymous visual field loss. Even individuals with severe visual field loss might be safe drivers. Therefore, it seems reasonable to provide an opportunity for individualized assessments of practical fitness to drive in circumstances of licensing issues. This study demonstrates the potential of using a standardized driving simulator test for such assessments of fitness to drive.
Source: Optometry and Vision Science - September 1, 2022 Category: Opthalmology Tags: FEATURE ARTICLE – PUBLIC ACCESS Source Type: research

Artificial intelligence-enabled retinal vasculometry for prediction of circulatory mortality, myocardial infarction and stroke
CONCLUSION: RV offers an alternative predictive biomarker to traditional risk-scores for vascular health, without the need for blood sampling or blood pressure measurement. Further work is needed to examine RV in population screening to triage individuals at high-risk.PMID:36195457 | DOI:10.1136/bjo-2022-321842
Source: The British Journal of Ophthalmology - October 4, 2022 Category: Opthalmology Authors: Alicja Regina Rudnicka Roshan Welikala Sarah Barman Paul J Foster Robert Luben Shabina Hayat Kay-Tee Khaw Peter Whincup David Strachan Christopher G Owen Source Type: research

INTRAVITREAL RANIBIZUMAB THERAPY FOR NEOVASCULAR AGE-RELATED MACULAR DEGENERATION AND THE RISK OF STROKE: A National Sample Cohort Study
Conclusion: Ranibizumab treatment for neovascular age-related macular degeneration did not increase the overall risk of stroke, compared with comorbidity-matched controls or sociodemographic-matched controls.
Source: RETINA - October 26, 2016 Category: Opthalmology Tags: Original Study Source Type: research

Imaging retina to study dementia and stroke
Publication date: Available online 3 January 2017 Source:Progress in Retinal and Eye Research Author(s): Carol Yim-lui Cheung, M. Kamran Ikram, Christopher Chen, Tien Yin Wong With increase in life expectancy, the number of persons suffering from common age-related brain diseases, including neurodegenerative (e.g., dementia) and cerebrovascular (e.g., stroke) disease is expected to rise substantially. As current neuro-imaging modalities such as magnetic resonance imaging may not be able to detect subtle subclinical changes (resolution <100–500 μm) in dementia and stroke, there is an urgent need for other comple...
Source: Progress in Retinal and Eye Research - January 2, 2017 Category: Opthalmology Source Type: research

Increased Risk of Stroke in Patients With Nonarteritic Anterior Ischemic Optic Neuropathy: A Nationwide Retrospective Cohort  Study
We appreciate Dr Hayreh's interesting comments on our study about the risk of stroke in patients with nonarteritic anterior ischemic optic neuropathy (NA-AION).1 Dr Hayreh asked a crucial question: does the development of NA-AION per se result in increased risk of stroke, or not? He also criticized that our observations of the risk of ischemic stroke among the subjects with NA-AION without comorbidities was not statistically different from those without NA-AION.1 These findings contradict our conclusion that patients who develop NA-AION have a higher risk of ischemic stroke than those without that.
Source: American Journal of Ophthalmology - January 3, 2017 Category: Opthalmology Authors: Rong-Kung Tsai, Yueh-Chang Lee, Jen-Hung Wang, Tzu-Lun Huang Tags: Correspondence Source Type: research

The effect of character stroke width on legibility: The relationship between duty ratio and contrast threshold
This study attempted to predict the optimal value of stroke width considering it as a duty ratio. The duty ratio is related to the amplitude of the fundamental frequency, with the maximum amplitude of the fundamental frequency occurring at a duty ratio of 0.5. The fundamental frequency decreases when the duty ratio is set either lower or higher than 0.5. Based on previous research indicating that letters also have a critical band (CB), or the frequency band which contributes most to letter recognition, which corresponds to their fundamental frequency, we hypothesized that the amplitude of CB is related to the legibility of...
Source: Vision Research - April 16, 2021 Category: Opthalmology Authors: Madoka Ohnishi Koichi Oda Source Type: research

Bedside Assessment of Vergence in Stroke Patients
Conclusions: There is only a limited localizing value of vergence deficits in stroke. Parietal lobe infarctions are more frequently associated with insufficient binocular and monocular vergence. Midbrain strokes were too few to draw final conclusions. However the most robust factor to emerge from our data is age. Older subjects show poor slow binocular as well as slow and fast monocular vergence. Extended white matter lesions are also correlated with deficient vergence ability suggesting a role for subcortical wide range connections in maintaining an intact vergence circuitry.
Source: Journal of Neuro-Ophthalmology - November 22, 2021 Category: Opthalmology Tags: Clinical Research: Epidemiology Meets Neuro-Ophthalmology Source Type: research

Acute posterior multifocal placoid pigment epitheliopathy: clinical presentation and risk of stroke and transient ischaemic attack
CONCLUSIONS: The presence of headache cannot reliably predict those at risk of stroke/TIA. Individuals presenting with acute posterior multifocal pigment epitheliopathy should therefore undergo a clinical neurological review and work-up for cerebral vasculitis as deemed appropriate by the treating ophthalmologist and collaborating neurologist.PMID:36657959 | DOI:10.1136/bjo-2022-321517
Source: The British Journal of Ophthalmology - January 19, 2023 Category: Opthalmology Authors: Rachael L Niederer Priya D Samalia Yi-Hsing Chen Jonathan Ks Goh Elisa Eleanor Cornish Stephen Guest Peter J McCluskey Lyndell L Lim Joanne L Sims Susan Lightman Oren Tomkins-Netzer Source Type: research

Increased Risk of Stroke in Patients With Nonarteritic Anterior Ischemic Optic Neuropathy: A Nationwide Retrospective Cohort Study
I was interested to read the study by Lee and associates1 about the risk of stroke in patients with nonarteritic anterior ischemic optic neuropathy (NA-AION). According to this retrospective cohort study of 414 NA-AION patients, with mean (standard deviation [SD]) age of 55.9  ± 18.6 years, the risk of ischemic stroke among NA-AION patients was 2.0 times higher than in those without NA-AION. They concluded that patients with NA-AION have an increased risk of ischemic stroke, compared with patients without NA-AION, especially older patients with systemic risk factors.
Source: American Journal of Ophthalmology - January 13, 2017 Category: Opthalmology Authors: Sohan Singh Hayreh Tags: Correspondence Source Type: research

Stroke risk and risk factors in patients with central retinal artery occlusion
This study evaluates the yield of this evaluation in patients with CRAO and frequency of stroke in this population.
Source: American Journal of Ophthalmology - August 25, 2018 Category: Opthalmology Authors: Patrick Lavin, Morgan Patrylo, Matthew Hollar, Kiersten B. Espaillat, Howard Kirshner, Matthew Schrag Tags: Original Articles Source Type: research

Incidence and profile of strabismus in an acute stroke population
This study reports the incidence of stroke-related strabismus, characteristics and recovery.
Source: Journal of AAPOS - August 1, 2018 Category: Opthalmology Authors: Fiona J. Rowe, Lauren R. Hepworth, Kerry Hanna, Claire Howard Tags: Paper Source Type: research

Purtscher-Like Retinopathy with Cardioembolic Stroke: Case Report and Literature Review
We present a case of PUR associated with a cardioembolic stroke in a patient following temporary cessation of anticoagulant therapy for a surgical procedure. Our patient presented with multiple risk factors for PUR and classic signs and symptoms including multiple peripapillary white retinal lesions near arterioles and sudden unilateral decrease in visual acuity. Optical coherence tomography showed inner retinal hyperreflectivity and thinning consistent with inner retinal ischemia, and fluorescein angiography showed delayed retinal filling. Her complement C5 factor was elevated on laboratory testing. Brain magnetic resonan...
Source: Case Reports in Ophthalmology - November 17, 2022 Category: Opthalmology Source Type: research