scholarly journals Efficacy of visual process improvement in patients with homonymous hemianopia

2021 ◽  
Vol 8 (1) ◽  
pp. 26-30
Author(s):  
Sławomir Nogaj ◽  
Katarzyna Dubas ◽  
Andrzej Michalski
Keyword(s):  
Traumatic Brain Injury ◽  
Visual Field ◽  
Process Improvement ◽  
Tumor Development ◽  
The Other ◽  
Daily Activities ◽  
Homonymous Hemianopia ◽  
Potential Danger ◽  
Field Defect ◽  
Binocular Visual Field

Homonymous hemianopia is a visual field defect following a stroke, tumor development, traumatic brain injury and other rare causes. Due to the damage to the visual system, lateral neglect occurs that induces difficulties with detecting objects on one side of the binocular visual field, which exposes patients to potential danger during daily activities, especially performed outside – in traffic. Different optical aids such as Fresnel prism have been developed to help those patients by increasing the perception of the affected hemifield. This prism correction can appear in various configurations, for instance: yoked prism, monocular and binocular sector prisms placed with a base to the affected side. The other option to deal with these patients is visual training based on stimulating the affected hemifield.

Inadequacy of self-assessment of vision, and fitness to drive

2017 ◽  
Vol 85 (4) ◽  
pp. 207-209
Author(s):  
John Garfield
Keyword(s):  
Visual Acuity ◽  
Visual Field ◽  
Visual Field Defect ◽  
Daily Activities ◽  
Elderly Persons ◽  
Fitness To Drive ◽  
Self Assessment ◽  
Driving Licence ◽  
Field Defect

The author, a retired neurosurgeon then aged 81, describes his own right upper quadrantic homonymous visual field defect which did not impair any normal daily activities. His own occupation allowed him to recognise the defect. It is unlikely that such a defect would have been noticed by other elderly persons. The field defect shown by perimetry (illustrated) debarred him from driving. Self-assessment of visual acuity, and especially fields, is inadequate when applying for renewal of a driving licence. Effective steps to prevent such licensing and the damage that may follow are discussed.

Visual asymmetries during face encoding Increased dwell time and fixations in the upper and left hemifields

2018 ◽  
Author(s):  
Fatima Maria Felisberti
Keyword(s):  
Face Recognition ◽  
Eye Movements ◽  
Visual Field ◽  
Face Processing ◽  
Dwell Time ◽  
The Other ◽  
Environmental Cues ◽  
Reading Habits ◽  
The Right

Visual field asymmetries (VFA) in the encoding of groups rather than individual faces has been rarely investigated. Here, eye movements (dwell time (DT) and fixations (Fix)) were recorded during the encoding of three groups of four faces tagged with cheating, cooperative, or neutral behaviours. Faces in each of the three groups were placed in the upper left (UL), upper right (UR), lower left (LL), or lower right (LR) quadrants. Face recognition was equally high in the three groups. In contrast, the proportion of DT and Fix were higher for faces in the left than the right hemifield and in the upper rather than the lower hemifield. The overall time spent looking at the UL was higher than in the other quadrants. The findings are relevant to the understanding of VFA in face processing, especially groups of faces, and might be linked to environmental cues and/or reading habits.

Visual Field Examination in Glaucoma Patients : Humphrey Visual Field Analysis vs Amsler Grid

2017 ◽  
Vol 43 (2) ◽  
pp. 124
Author(s):  
Ivana Tanoko ◽  
Fifin L Rahmi
Keyword(s):  
Visual Field ◽  
Visual Field Defect ◽  
Glaucoma Patient ◽  
Field Analysis ◽  
Glaucomatous Optic Neuropathy ◽  
Visual Field Examination ◽  
Cross Sectional ◽  
Rnfl Thickness ◽  
Amsler Grid ◽  
Field Defect

Introduction and Objective: Glaucoma is the leading cause of global irreversible blindness, signed by glaucomatous optic neuropathy related to visual field defect. The purpose of the study is comparing visual field defect examination using HVFA to Amsler Grid in glaucoma patient at dr. Kariadi Hospital. Methods: This is a cross-sectional study. Amsler Grid were performed to the patients who have reliable HVFA at last 6 months and presented as descriptive analytic results. Result: There were 40 eyes involved in this study from 27 patients (15 men, 12 women), 26-68 years old and visual acuity 1/60-6/6. Seventeen eyes showed visual field defect in HVFA and Amsler Grid had average MD - 24.97 dB, CDR 0.89 and RNFL thickness 51.74. We found that 11 eyes didn’t showed in both of examination had average MD -8.06, CDR 0.63 and RNFL thickness 103.23 and those parameters are significantly different to the 17 eyes before (p<0.05). Data from 12 eyes that showed visual field defect only one of examination (9 only in HVFA and 3 in Amsler Grid) didn’t show difference statistically each other. Conclusion: HFVA and Amsler Grid seemed to be comparable in detecting visual field defect in advanced glaucoma.

scholarly journals Acute Zonal Occult Outer Retinopathy: Vision Loss in an Active Duty Soldier

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
Courtney M. Crawford ◽  
Bruce A. Rivers ◽  
Mark Nelson
Keyword(s):  
Visual Field ◽  
Visual Field Defect ◽  
Vision Loss ◽  
Fundus Autofluorescence ◽  
Final Diagnosis ◽  
Active Duty ◽  
Visual Field Defects ◽  
Fundus Photographs ◽  
Optical Coherence Tomograph ◽  
Field Defect

Objective. To describe a case of acute zonal occult outer retinopathy (AZOOR) in an active duty patient.Methods. In this paper we studied fundus photographs, optical coherence tomograph, Humphrey visual field 30-2, fundus autofluorescence images, fluorescein angiograms, and electroretinography.Results. Exam findings on presentation: a 34-year-old American Indian female presented with bilateral photopsias, early RPE irregularity, and an early temporal visual field defect. Progression RPE damage and visual field defect along with ERG findings support final diagnosis of AZOOR.Conclusion. AZOOR may initially be identified as a broader category of disease called the “AZOOR complex of disorders”. Specific visual field defects, ERG results, and clinical exam findings will help distinguish AZOOR from other similar disorders.

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