Spatially Consistent, Localized Visual Field Loss before and after Disc Hemorrhage

2009 ◽  
Vol 50 (10) ◽  
pp. 4727 ◽  
Author(s):  
Carlos Gustavo V. De Moraes ◽  
Tiago S. Prata ◽  
Craig A. Liebmann ◽  
Celso Tello ◽  
Robert Ritch ◽  
...  
Keyword(s):  
Visual Field ◽  
Visual Field Loss ◽  
Disc Hemorrhage ◽  
Before And After

The Relationship between Intraocular Pressure Reduction and Rates of Progressive Visual Field Loss in Eyes with Optic Disc Hemorrhage

Ophthalmology ◽  
2010 ◽  
Vol 117 (11) ◽  
pp. 2061-2066 ◽  
Author(s):  
Felipe A. Medeiros ◽  
Luciana M. Alencar ◽  
Pamela A. Sample ◽  
Linda M. Zangwill ◽  
Remo Susanna Jr. ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Visual Field ◽  
Optic Disc ◽  
Visual Field Loss ◽  
Pressure Reduction ◽  
Disc Hemorrhage ◽  
Intraocular Pressure Reduction ◽  
The Relationship

scholarly journals Spared perilesional V1 activity underlies training-induced recovery of luminance detection sensitivity in cortically-blind patients

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Antoine Barbot ◽  
Anasuya Das ◽  
Michael D. Melnick ◽  
Matthew R. Cavanaugh ◽  
Elisha P. Merriam ◽  
...  
Keyword(s):  
Visual Field ◽  
Visual Discrimination ◽  
Receptive Fields ◽  
Visual Field Loss ◽  
Detection Sensitivity ◽  
Perceptual Training ◽  
Visual Functions ◽  
Before And After ◽  
Plastic Changes ◽  
V1 Cortex

AbstractDamage to the primary visual cortex (V1) causes homonymous visual-field loss long considered intractable. Multiple studies now show that perceptual training can restore visual functions in chronic cortically-induced blindness (CB). A popular hypothesis is that training can harness residual visual functions by recruiting intact extrageniculostriate pathways. Training may also induce plastic changes within spared regions of the damaged V1. Here, we link changes in luminance detection sensitivity with retinotopic fMRI activity before and after visual discrimination training in eleven patients with chronic, stroke-induced CB. We show that spared V1 activity representing perimetrically-blind locations prior to training predicts the amount of training-induced recovery of luminance detection sensitivity. Additionally, training results in an enlargement of population receptive fields in perilesional V1, which increases blind-field coverage and may support further recovery with subsequent training. These findings uncover fundamental changes in perilesional V1 cortex underlying training-induced restoration of conscious luminance detection sensitivity in CB.

Predicting Subsequent Visual Field Loss in Glaucomatous Subjects With Disc Hemorrhage Using Retinal Nerve Fiber Layer Polarimetry

2005 ◽  
Vol 14 (1) ◽  
pp. 20-25 ◽  
Author(s):  
Pinakin Gunvant ◽  
Yufeng Zheng ◽  
Edward A Essock ◽  
Philip P Chen ◽  
David S Greenfield ◽  
...  
Keyword(s):  
Visual Field ◽  
Nerve Fiber ◽  
Retinal Nerve Fiber Layer ◽  
Visual Field Loss ◽  
Fiber Layer ◽  
Disc Hemorrhage ◽  
Nerve Fiber Layer ◽  
Retinal Nerve Fiber

Rates of visual field loss before and after trabeculectomy

2013 ◽  
Vol 92 (2) ◽  
pp. 116-120 ◽  
Author(s):  
Valérie Bertrand ◽  
Steffen Fieuws ◽  
Ingeborg Stalmans ◽  
Thierry Zeyen
Keyword(s):  
Visual Field ◽  
Visual Field Loss ◽  
Before And After

scholarly journals Use of NeuroEyeCoach™ to Improve Eye Movement Efficacy in Patients with Homonymous Visual Field Loss

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Arash Sahraie ◽  
Nicola Smania ◽  
Josef Zihl
Keyword(s):  
Visual Search ◽  
Visual Field ◽  
Eye Movement ◽  
Group Performance ◽  
Visual Field Loss ◽  
Control Group ◽  
Movement Training ◽  
Visual Field Deficits ◽  
Before And After ◽  
Healthy Control

Visual field deficits are common in patients with damaged retinogeniculostriate pathways. The patient’s eye movements are often affected leading to inefficient visual search. Systematic eye movement training also called compensatory therapy is needed to allow patients to develop effective coping strategies. There is a lack of evidence-based, clinical gold-standard registered medical device accessible to patients at home or in clinical settings and NeuroEyeCoach (NEC) is developed to address this need. In three experiments, we report on performance of patients on NEC compared to the data obtained previously on the earlier versions of the search task (n=32); we assessed whether the self-administered computerised tasks can be used to monitor the progress (n=24) and compared the findings in a subgroup of patients to a healthy control group. Performance on cancellation tasks, simple visual search, and self-reported responses on activities of daily living was compared, before and after training. Patients performed similarly well on NEC as on previous versions of the therapy; the inbuilt functionality for pre- and postevaluation functions was sensitive to allowing assessment of improvements; and improvements in patients were significantly greater than those in a group of healthy adults. In conclusion, NeuroEyeCoach can be used as an effective rehabilitation tool to develop compensatory strategies in patients with visual field deficits after brain injury.

scholarly journals Search training for people with visual field loss after stroke: A cohort study

2017 ◽  
Vol 81 (5) ◽  
pp. 255-265
Author(s):  
Ailie J Turton ◽  
Jayne Angilley ◽  
Verity Longley ◽  
Philip Clatworthy ◽  
Iain D Gilchrist
Keyword(s):  
Visual Field ◽  
Visual Function ◽  
Visual Field Loss ◽  
Gaze Tracking ◽  
Patient Reports ◽  
Patient Reported ◽  
Before And After ◽  
Visual Function Questionnaire ◽  
Improved Performance ◽  
Search Training

Introduction People with visual field loss after stroke often experience difficulties in everyday activities. The purpose of this study was to assess the acceptability of search training as used within occupational therapy and the feasibility of possible measures for use in a future trial. Method Nine participants took part in a goal oriented intervention that was delivered three times a week for 3 weeks. Patient reports of acceptability and outcomes using the Visual Function Questionnaire-25 were collected. Participants’ room-search behaviour before and after the intervention was recorded using a head-worn camera. Results Eight participants completed nine treatment visits. All participants reported improved awareness and attention to the blind side during activities following the intervention. Seven participants’ change scores on the Visual Function Questionnaire-25 exceeded six points. Patterns of head-direction behaviour and overall room-search times were variable across patients; markedly, improved performance was only evident in the most severely affected participant. Conclusion The intervention was acceptable. The Visual Function Questionnaire-25 is a feasible measure for assessing patient-reported outcomes. While the room search was informative about individuals’ behaviour, more sophisticated methods of gaze tracking would allow search processes to be determined in real-world activities that are relevant to patients’ goals.

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