Results 41 to 50 of about 1,118,673 (315)

Grasping the non-conscious: Preserved grip scaling to unseen objects for immediate but not delayed grasping following a unilateral lesion to primary visual cortex [PDF]

open access: yes, 2011
Patients with damage to primary visual cortex can sometimes direct actions towards ‘unseen’ targets located in areas of the visual field that are deemed ‘blind’ on the basis of static perimetry tests.
Goodale, Melvyn A.   +3 more
core   +1 more source

Optic Disc Drusen Presenting with Binasal Hemianopia

open access: yesTürk Oftalmoloji Dergisi, 2013
Optic disc drusen (ODD) are defined as a form of calcific degeneration of the optic nerve. Visual field defects are seen in nearly 90% of the cases. We report a 32-year-old woman who was referred to our clinic with the complaint of longstanding blurred ...
Hasan Ali Tufan   +5 more
doaj   +1 more source

Detection and correlation of changes on perimetry and optical coherence tomography in patients on chronic usage of hydroxychloroquine: A Cross-Sectional StudyDetection and Correlation of changes on Perimetry and Optical coherence tomography in patients on Chronic Usage of Hydroxychloroquine: A cross-sectional study

open access: yesIndian Journal of Rheumatology, 2022
Background: Early detection of retinal toxicity in patients on chronic usage of hydroxychloroquine (HCQ) and thereby the prevention of irreversible visual loss is an important goal. Methods: We performed a comprehensive ophthalmologic examination, visual
Yamini Priya   +4 more
doaj   +1 more source

Acute Visual Field Defect following Vitrectomy Determined to Originate from Optic Nerve by Electrophysiological Tests

open access: yesCase Reports in Ophthalmology, 2012
Purpose: To present our findings on the cause of an acute visual field defect (VFD) that developed in a patient on the day after vitrectomy for proliferative diabetic retinopathy.
Atsuro Uchida   +10 more
doaj   +1 more source

Evaluation of anatomical and visual function for early detection of ethambutol toxicity among tuberculosis patients [PDF]

open access: yes, 2017
AIM: To evaluate if early ethambutol toxicity can be detected by comparing pre - and post - treatment anatomical and visual function using retinal nerve fiber thickness, pattern visual evoked potentials and conventional optic nerve function tests ...
Mohd Noor, Raja Azmi   +5 more
core   +2 more sources

Errors and Accurate Correction Methods in Ophthalmic Visual Field Tests

open access: yesKorean Journal of Clinical Laboratory Science
This study aimed to strengthen visual field testing standards and improve the quality of patient care in ophthalmology by emphasizing the need for accurate refractive correction.
Sung-Hyun KIM
doaj   +1 more source

Retinal Nerve Fiber Layer Features Identified by Unsupervised Machine Learning on Optical Coherence Tomography Scans Predict Glaucoma Progression. [PDF]

open access: yes, 2018
Purpose:To apply computational techniques to wide-angle swept-source optical coherence tomography (SS-OCT) images to identify novel, glaucoma-related structural features and improve detection of glaucoma and prediction of future glaucomatous progression.
Belghith, Akram   +7 more
core   +1 more source

A prospective, population-based study of the role of visual impairment in motor vehicle crashes among older drivers: the SEE study. [PDF]

open access: yes, 2007
PURPOSE: To determine the role of vision and visual attention factors in automobile crash involvement. METHODS: Drivers aged 65 to 84 years were identified during the baseline interview (1993-1995) of the Salisbury Eye Evaluation (SEE) Study.
Bandeen-Roche, Karen   +5 more
core   +1 more source

A matter of time: Improvement of visual temporal processing during training-induced restoration of light detection performance

open access: yesFrontiers in Psychology, 2015
The issue of how basic sensory and temporal processing are related is still unresolved. We studied temporal processing, as assessed by simple visual reaction times (RT) and double-pulse resolution (DPR), in patients with partial vision loss after visual ...
Dorothe A. Poggel   +6 more
doaj   +1 more source

Unexplained Progressive Visual Field Loss in the Presence of Normal Retinotopic Maps

open access: yesFrontiers in Psychology, 2018
Lesions of primary visual cortex or its primary inputs typically result in retinotopically localized scotomas. Here we present an individual with unexplained visual field loss and deficits in visual perception in the absence of structural damage to the ...
Christina Moutsiana   +10 more
doaj   +1 more source

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