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Namgung E, Kwon SU, Han M, Kim G, Kim HY, Park K, Cho M, Choi H, Nah H, Lim HT, Kang D. Digital therapeutics using virtual reality-based visual perceptual learning for visual field defects in stroke: A double-blind randomized trial. Brain Behav 2024; 14:e3525. [PMID: 38773793 PMCID: PMC11109502 DOI: 10.1002/brb3.3525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 04/04/2024] [Accepted: 04/19/2024] [Indexed: 05/24/2024] Open
Abstract
INTRODUCTION Visual field defects (VFDs) represent a debilitating poststroke complication, characterized by unseen parts of the visual field. Visual perceptual learning (VPL), involving repetitive visual training in blind visual fields, may effectively restore visual field sensitivity in cortical blindness. This current multicenter, double-blind, randomized, controlled clinical trial investigated the efficacy and safety of VPL-based digital therapeutics (Nunap Vision [NV]) for treating poststroke VFDs. METHODS Stroke outpatients with VFDs (>6 months after stroke onset) were randomized into NV (defective field training) or Nunap Vision-Control (NV-C, central field training) groups. Both interventions provided visual perceptual training, consisting of orientation, rotation, and depth discrimination, through a virtual reality head-mounted display device 5 days a week for 12 weeks. The two groups received VFD assessments using Humphrey visual field (HVF) tests at baseline and 12-week follow-up. The final analysis included those completed the study (NV, n = 40; NV-C, n = 35). Efficacy measures included improved visual area (sensitivity ≥6 dB) and changes in the HVF scores during the 12-week period. RESULTS With a high compliance rate, NV and NV-C training improved the visual areas in the defective hemifield (>72 degrees2) and the whole field (>108 degrees2), which are clinically meaningful improvements despite no significant between-group differences. According to within-group analyses, mean total deviation scores in the defective hemifield improved after NV training (p = .03) but not after NV-C training (p = .12). CONCLUSIONS The current trial suggests that VPL-based digital therapeutics may induce clinically meaningful visual improvements in patients with poststroke VFDs. Yet, between-group differences in therapeutic efficacy were not found as NV-C training exhibited unexpected improvement comparable to NV training, possibly due to learning transfer effects.
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Affiliation(s)
- Eun Namgung
- Asan Institute for Life SciencesAsan Medical CenterSeoulSouth Korea
| | - Sun U. Kwon
- Department of Neurology, Asan Medical CenterUniversity of Ulsan College of MedicineSeoulSouth Korea
| | - Moon‐Ku Han
- Department of NeurologySeoul National University Bundang Hospital, Seoul National University College of MedicineSeongnamSouth Korea
| | - Gyeong‐Moon Kim
- Department of Neurology, Samsung Medical CenterSungkyunkwan University School of MedicineSeoulSouth Korea
| | - Hahn Young Kim
- Department of NeurologyKonkuk University Medical Center, Konkuk University College of MedicineSeoulSouth Korea
| | - Kwang‐Yeol Park
- Department of NeurologyChung‐Ang University Hospital, Chung‐Ang University College of MedicineSeoulSouth Korea
| | | | | | - Hyun‐Wook Nah
- Department of NeurologyChungnam National University Sejong Hospital, Chungnam National University College of MedicineSejongSouth Korea
| | - Hyun Taek Lim
- Department of Ophthalmology, Asan Medical CenterUniversity of Ulsan College of MedicineSeoulSouth Korea
| | - Dong‐Wha Kang
- Department of Neurology, Asan Medical CenterUniversity of Ulsan College of MedicineSeoulSouth Korea
- Nunaps Inc.SeoulSouth Korea
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Tol S, de Haan GA, Postuma EMJL, Jansen JL, Heutink J. Reading Difficulties in Individuals with Homonymous Visual Field Defects: A Systematic Review of Reported Interventions. Neuropsychol Rev 2024:10.1007/s11065-024-09636-4. [PMID: 38639880 DOI: 10.1007/s11065-024-09636-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 02/20/2024] [Indexed: 04/20/2024]
Abstract
Reading difficulties are amongst the most commonly reported problems in individuals with homonymous visual field defects (HVFDs). To be able to provide guidance for healthcare professionals considering offering reading training, researchers in this field and interested individuals with HVFDs, this systematic review aims to (1) provide an overview of the contextual and intervention characteristics of all published HVFD interventions and (2) generate insights into the different reading outcome measures that these studies adopted. A search on PsycINFO, MEDLINE and Web of Science was conducted up to February 2, 2023. All intervention studies for HVFD in which reading was measured were included. Data was collected about the intervention type, session duration, number of sessions, the intensity, duration, circumstance of the interventions, country in which the intervention was studied and reading measures. Sixty records are included, describing 70 interventions in total of which 21 are specifically reading interventions. Overall, adjusted saccadic behaviour interventions occur most in the literature. A wide range within all intervention characteristics was observed. Forty-nine records reported task-performance reading measures, and 33 records reported self-reported reading measures. The majority of task-performance measures are based on self-developed paragraph reading tasks with a time-based outcome measure (e.g. words per minute). Future research could benefit from making use of validated reading tests, approaching the measurement of reading mixed-methods and providing participants the possibility to supply outcomes relevant to them.
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Affiliation(s)
- S Tol
- Clinical and Developmental Neuropsychology, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands.
| | - G A de Haan
- Clinical and Developmental Neuropsychology, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands
- Royal Dutch Visio, Centre of Expertise for Blind and Partially Sighted People, Amersfoortsestraatweg 180, 1272 RR, Huizen, The Netherlands
| | - E M J L Postuma
- Clinical and Developmental Neuropsychology, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands
| | - J L Jansen
- Clinical and Developmental Neuropsychology, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands
| | - J Heutink
- Clinical and Developmental Neuropsychology, University of Groningen, Grote Kruisstraat 2/1, 9712 TS, Groningen, The Netherlands
- Royal Dutch Visio, Centre of Expertise for Blind and Partially Sighted People, Amersfoortsestraatweg 180, 1272 RR, Huizen, The Netherlands
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E JY, Li T, McInally L, Thomson K, Shahani U, Gray L, Howe TE, Skelton DA. Environmental and behavioural interventions for reducing physical activity limitation and preventing falls in older people with visual impairment. Cochrane Database Syst Rev 2020; 9:CD009233. [PMID: 32885841 PMCID: PMC8095028 DOI: 10.1002/14651858.cd009233.pub3] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Impairment of vision is associated with a decrease in activities of daily living. Avoidance of physical activity in older adults with visual impairment can lead to functional decline and is an important risk factor for falls. The rate of falls and fractures is higher in older people with visual impairment than in age-matched visually normal older people. Possible interventions to reduce activity restriction and prevent falls include environmental and behavioral interventions. OBJECTIVES We aimed to assess the effectiveness and safety of environmental and behavioral interventions in reducing physical activity limitation, preventing falls and improving quality of life amongst visually impaired older people. SEARCH METHODS We searched CENTRAL (including the Cochrane Eyes and Vision Trials Register) (Issue 2, 2020), Ovid MEDLINE, Embase and eight other databases to 4 February 2020, with no language restrictions. SELECTION CRITERIA Eligible studies were randomized controlled trials (RCTs) and quasi-randomized controlled trials (Q-RCTs) that compared environmental interventions, behavioral interventions or both, versus control (usual care or no intervention); or that compared different types of environmental or behavioral interventions. Eligible study populations were older people (aged 60 and over) with irreversible visual impairment, living in their own homes or in residential settings. To be eligible for inclusion, studies must have included a measure of physical activity or falls, the two primary outcomes of interest. Secondary outcomes included fear of falling, and quality of life. DATA COLLECTION AND ANALYSIS We used standard Cochrane methods. We assessed the certainty of the evidence using the GRADE approach. MAIN RESULTS We included six RCTs (686 participants) conducted in five countries (Australia, Hungary, New Zealand, UK, US) with follow-up periods ranging from two to 12 months. Participants in these trials included older adults (mean age 80 years) and were mostly female (69%), with visual impairments of varying severity and underlying causes. Participants mostly lived in their homes and were physically independent. We classified all trials as having high risk of bias for masking of participants, and three trials as having high or unclear risk of bias for all other domains. The included trials evaluated various intervention strategies (e.g. an exercise program versus home safety modifications). Heterogeneity of study characteristics, including interventions and outcomes, (e.g. different fall measures), precluded any meta-analysis. Two trials compared the home safety modification by occupational therapists versus social/home visits. One trial (28 participants) reported physical activity at six months and showed no evidence of a difference in mean estimates between groups (step counts: mean difference (MD) = 321, 95% confidence interval (CI) -1981 to 2623; average walking time (minutes): MD 1.70, 95% CI -24.03 to 27.43; telephone questionnaire for self-reported physical activity: MD -3.68 scores, 95% CI -20.6 to 13.24; low-certainty of evidence for each outcome). Two trials reported the proportion of participants who fell at six months (risk ratio (RR) 0.76, 95% CI 0.38 to 1.51; 28 participants) and 12 months (RR 0.59, 95% CI 0.43 to 0.80, 196 participants) with low-certainty of evidence for each outcome. One trial (28 participants) reported fear of falling at six months, using the Short Falls Efficacy Scale-International, and found no evidence of a difference in mean estimates between groups (MD 2.55 scores, 95% CI -0.51 to 5.61; low-certainty of evidence). This trial also reported quality of life at six months using 12-Item Short Form Health Survey, and showed no evidence of a difference in mean estimates between groups (MD -3.14 scores, 95% CI -10.86 to 4.58; low-certainty of evidence). Five trials compared a behavioral intervention (exercise) versus usual activity or social/home visits. One trial (59 participants) assessed self-reported physical activity at six months and showed no evidence of a difference between groups (MD 9.10 scores, 95% CI -13.85 to 32.5; low-certainty of evidence). Three trials investigated different fall measures at six or 12 months, and found no evidence of a difference in effect estimates (RRs for proportion of fallers ranged from 0.54 (95% CI 0.29 to 1.01; 41 participants); to 0.93 (95% CI 0.61 to 1.39; 120 participants); low-certainty of evidence for each outcome). Three trials assessed the fear of falling using Short Falls Efficacy Scale-International or the Illinois Fear of Falling Measure from two to 12 months, and found no evidence of a difference in mean estimates between groups (the estimates ranged from -0.88 score (95% CI -2.72 to 0.96, 114 participants) to 1.00 score (95% CI -0.13 to 2.13; 59 participants); low-certainty of evidence). One trial (59 participants) assessed the European Quality of Life scale at six months (MD -0.15 score, 95% CI -0.29 to -0.01), and found no evidence of a clinical difference between groups (low-certainty of evidence). AUTHORS' CONCLUSIONS There is no evidence of effect for most of the environmental or behavioral interventions studied for reducing physical activity limitation and preventing falls in visually impaired older people. The certainty of evidence is generally low due to poor methodological quality and heterogeneous outcome measurements. Researchers should form a consensus to adopt standard ways of measuring physical activity and falls reliably in older people with visual impairments. Fall prevention trials should plan to use objectively measured or self-reported physical activity as outcome measures of reduced activity limitation. Future research should evaluate the acceptability and applicability of interventions, and use validated questionnaires to assess the adherence to rehabilitative strategies and performance during activities of daily living.
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Affiliation(s)
- Jian-Yu E
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Tianjing Li
- Department of Ophthalmology, University of Colorado Denver Anschutz Medical Campus, Aurora, CO, USA
| | | | | | - Uma Shahani
- Department of Visual Sciences, Glasgow Caledonian University, Glasgow, UK
| | - Lyle Gray
- Life Sceince, Glasgow Caledonian University, Glasgow, UK
| | | | - Dawn A Skelton
- School of Health & Life Sciences, Institute of Applied Health Research, Glasgow Caledonian University, Glasgow, UK
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Mena-Garcia L, Maldonado-Lopez MJ, Fernandez I, Coco-Martin MB, Finat-Saez J, Martinez-Jimenez JL, Pastor-Jimeno JC, Arenillas JF. Visual processing speed in hemianopia patients secondary to acquired brain injury: a new assessment methodology. J Neuroeng Rehabil 2020; 17:12. [PMID: 32005265 PMCID: PMC6995150 DOI: 10.1186/s12984-020-0650-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 01/23/2020] [Indexed: 01/10/2023] Open
Abstract
Background There is a clinical need to identify diagnostic parameters that objectively quantify and monitor the effective visual ability of patients with homonymous visual field defects (HVFDs). Visual processing speed (VPS) is an objective measure of visual ability. It is the reaction time (RT) needed to correctly search and/or reach for a visual stimulus. VPS depends on six main brain processing systems: auditory-cognitive, attentional, working memory, visuocognitive, visuomotor, and executive. We designed a new assessment methodology capable of activating these six systems and measuring RTs to determine the VPS of patients with HVFDs. Methods New software was designed for assessing subject visual stimulus search and reach times (S-RT and R-RT respectively), measured in seconds. Thirty-two different everyday visual stimuli were divided in four complexity groups that were presented along 8 radial visual field positions at three different eccentricities (10o, 20o, and 30o). Thus, for each HVFD and control subject, 96 S- and R-RT measures related to VPS were registered. Three additional variables were measured to gather objective data on the validity of the test: eye-hand coordination mistakes (ehcM), eye-hand coordination accuracy (ehcA), and degrees of head movement (dHM, measured by a head-tracker system). HVFD patients and healthy controls (30 each) matched by age and gender were included. Each subject was assessed in a single visit. VPS measurements for HFVD patients and control subjects were compared for the complete test, for each stimulus complexity group, and for each eccentricity. Results VPS was significantly slower (p < 0.0001) in the HVFD group for the complete test, each stimulus complexity group, and each eccentricity. For the complete test, the VPS of the HVFD patients was 73.0% slower than controls. They also had 335.6% more ehcMs, 41.3% worse ehcA, and 189.0% more dHMs than the controls. Conclusions Measurement of VPS by this new assessment methodology could be an effective tool for objectively quantifying the visual ability of HVFD patients. Future research should evaluate the effectiveness of this novel method for measuring the impact that any specific neurovisual rehabilitation program has for these patients.
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Affiliation(s)
- Laura Mena-Garcia
- Universidad de Valladolid, Valladolid, Spain. .,Instituto Universitario de Oftalmobiología Aplicada (IOBA), Eye Institute, Universidad de Valladolid, Valladolid, Spain.
| | - Miguel J Maldonado-Lopez
- Universidad de Valladolid, Valladolid, Spain.,Instituto Universitario de Oftalmobiología Aplicada (IOBA), Eye Institute, Universidad de Valladolid, Valladolid, Spain
| | - Itziar Fernandez
- Instituto Universitario de Oftalmobiología Aplicada (IOBA), Eye Institute, Universidad de Valladolid, Valladolid, Spain.,CIBER BBN, National Institute of Health Carlos III, Madrid, Spain
| | - Maria B Coco-Martin
- Universidad de Valladolid, Valladolid, Spain.,Department of Neurology, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - Jaime Finat-Saez
- ASPAYM-Castilla y Leon Foundation, Research Centre for Physical Disabilities, Valladolid, Spain
| | - Jose L Martinez-Jimenez
- ASPAYM-Castilla y Leon Foundation, Research Centre for Physical Disabilities, Valladolid, Spain
| | - Jose C Pastor-Jimeno
- Universidad de Valladolid, Valladolid, Spain.,Instituto Universitario de Oftalmobiología Aplicada (IOBA), Eye Institute, Universidad de Valladolid, Valladolid, Spain.,Department of Ophthalmology, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - Juan F Arenillas
- Universidad de Valladolid, Valladolid, Spain.,Department of Neurology, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
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Trauzettel-Klosinski S. Aktuelle Möglichkeiten der visuellen Rehabilitation. SPEKTRUM DER AUGENHEILKUNDE 2019. [DOI: 10.1007/s00717-019-0432-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Endo T, Hozumi K, Hirota M, Kanda H, Morimoto T, Nishida K, Fujikado T. The influence of visual field position induced by a retinal prosthesis simulator on mobility. Graefes Arch Clin Exp Ophthalmol 2019; 257:1765-1770. [PMID: 31147839 DOI: 10.1007/s00417-019-04375-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Revised: 04/16/2019] [Accepted: 05/20/2019] [Indexed: 11/26/2022] Open
Abstract
PURPOSE Our aim is to develop a new generation of suprachoroidal-transretinal stimulation (STS) retinal prosthesis using a dual-stimulating electrode array to enlarge the visual field. In the present study, we aimed to examine how position and size of the visual field-created by a retinal prosthesis simulator-influenced mobility. METHODS Twelve healthy subjects wore retinal prosthesis simulators. Images captured by a web camera attached to a head-mounted display (HMD) were processed by a computer and displayed on the HMD. Three types of artificial visual fields-designed to imitate phosphenes-obtained by a single (5 × 5 electrodes; visual angle, 15°) or dual (5 × 5 electrodes ×2; visual angle, 30°) electrode array were created. Visual field (VF)1 is an inferior visual field, which corresponds to a dual-electrode array implanted in the superior hemisphere. VF2 is a superior visual field, which corresponds to a single-electrode array implanted in the inferior hemisphere. VF3 is a superior visual field, which corresponds to a dual-electrode array implanted in the inferior hemisphere. In each type of artificial visual field, a natural circular visual field (visual angle, 5°) which imitated the vision of patients with advanced retinitis pigmentosa existed at the center. Subjects were instructed to walk along a black carpet (6 m long × 2.2 m wide) without stepping on attached white circular obstacles. Each obstacle was 20 cm in diameter, and obstacles were installed at 40-cm intervals. We measured the number of footsteps on the obstacles, the time taken to complete the obstacle course, and the extent of head movement to scan the area (head-scanning). We then compared the results recorded from these 3 types of artificial visual field. RESULTS The number of footsteps on obstacles was lowest in VF3 (One-way ANOVA; P = 0.028, Fisher's LSD; VF 1 versus 3 P = 0.039, 2 versus 3 P = 0.012). No significant difference was observed for the time to complete the obstacle course or the extent of head movement between the 3 visual fields. CONCLUSION The superior and wide visual field (VF3) obtained by the retinal prosthesis simulator resulted in better mobility performance than the other visual fields.
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Affiliation(s)
- Takao Endo
- Department of Ophthalmology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kenta Hozumi
- Department of Ophthalmology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Masakazu Hirota
- Department of Applied Visual Science, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hiroyuki Kanda
- Department of Applied Visual Science, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Takeshi Morimoto
- Department of Applied Visual Science, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kohji Nishida
- Department of Ophthalmology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Takashi Fujikado
- Department of Applied Visual Science, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
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Trauzettel-Klosinski S. Aktuelle Möglichkeiten der visuellen Rehabilitation. Ophthalmologe 2018; 115:895-910. [DOI: 10.1007/s00347-018-0767-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ivanov IV, Kuester S, MacKeben M, Krumm A, Haaga M, Staudt M, Cordey A, Gehrlich C, Martus P, Trauzettel-Klosinski S. Effects of visual search training in children with hemianopia. PLoS One 2018; 13:e0197285. [PMID: 30020930 PMCID: PMC6051578 DOI: 10.1371/journal.pone.0197285] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 04/27/2018] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND This study investigates the effect of a new computer-based visual search training (VST) that was adapted for children with homonymous hemianopia (HH). METHODS 22 children with HH (median age 11 years, 8 months: 6y6m-19y2m) trained at home for 15 minutes twice/day, 5 days/week, for 6 weeks. To assess performance before training (T1), directly after training (T2) and 6 weeks after the end of training (T3), we measured search times (STs) during on-screen search (with eye tracking), and in a real life search task. Additional variables analyzed during on-screen search were numbers, amplitudes, and durations of saccades, their directional patterns and the proportional number of saccades into the non-seeing field. The latter was the main variable during free viewing. Sixteen healthy age-matched children, who did not undergo the training, served as comparison group. Quality of Life (QoL)-questionnaires were also applied. RESULTS STs of the patients decreased significantly during the training and all search performance tests. This improvement persisted 6 weeks after the end of the training. Saccade amplitudes increased, total number of saccades to find the target decreased, and the proportional number of saccades to the non-seeing side increased. These changes were maintained at T3. Saccade durations did not change. During free viewing, saccades were equally distributed to both sides before and after training. Patients reported improvements in QoL and activities of daily living. Performance in the healthy children did not change by simply repeating the visual search test. CONCLUSIONS The improvement in STs in all search tasks, larger and fewer saccades, and an improved search strategy after VST suggests that the children with HH benefited from the training. The maintained improvement at T3 and the improvement in the real life search task indicate that the newly developed search strategy persists and can be applied to everyday life.
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Affiliation(s)
- Iliya V. Ivanov
- Vision Rehabilitation Research Unit, Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
- ZEISS Vision Science Lab, Institute for Ophthalmic Research, Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
| | - Stephan Kuester
- Vision Rehabilitation Research Unit, Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
| | - Manfred MacKeben
- The Smith-Kettlewell Eye Research Institute, San Francisco, California, United States of America
| | - Anna Krumm
- Vision Rehabilitation Research Unit, Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
| | - Manja Haaga
- Pediatric Neurology, University Children’s Hospital Tübingen, Tübingen, Germany
| | - Martin Staudt
- Pediatric Neurology, University Children’s Hospital Tübingen, Tübingen, Germany
- Schön Klinik Vogtareuth, Clinic for Neuropediatrics and Neurorehabilitation, Vogtareuth, Germany
| | - Angelika Cordey
- Vision Rehabilitation Research Unit, Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
| | - Claudia Gehrlich
- Vision Rehabilitation Research Unit, Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
| | - Peter Martus
- Institute for Clinical Epidemiology and Applied Biometry, University of Tübingen, Tübingen, Germany
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Bowers AR, Dickinson C, Peli E. Comments about outcome measures for clinical trials of interventions for post-stroke patients with hemianopia. Acta Neurol Scand 2017; 136:548-550. [PMID: 28980309 DOI: 10.1111/ane.12770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. R. Bowers
- Schepens Eye Research Institute, Massachusetts Eye and Ear; Harvard Medical School; Boston MA USA
| | - C. Dickinson
- Division of Pharmacy and Optometry; School of Heath Sciences; Faculty of Biology, Medicine and Health; Manchester Academic Health Science Centre; University of Manchester; Manchester UK
| | - E. Peli
- Schepens Eye Research Institute, Massachusetts Eye and Ear; Harvard Medical School; Boston MA USA
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