The Experts below are selected from a list of 2550 Experts worldwide ranked by ideXlab platform
Augustinus Laude - One of the best experts on this subject based on the ideXlab platform.
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Automatic Detection of Preferred Retinal Locus (PRL) for Low Vision Rehabilitation using Oculometrics Analysis*
2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2018Co-Authors: Damon Wong, Augustinus LaudeAbstract:Low Vision Rehabilitation is an important step towards individuals with Age-related macular degeneration (AMD) regaining useful functional Vision and quality of life. One of the key steps in low Vision Rehabilitation is the determination of the preferred retinal locus (PRL). Currently, localization of PRL is performed manually though the guidance of a low Vision therapist and the process is highly time-consuming, labour-intensive and subjective. In this paper, we present an automated system to objectively and accurately locate an individual's PRL with the aid of gaze tracking technology. We also propose a graph-based method for false fixation detection to improve the system robustness. We validated the reliability of the system by using eye tracking technology to simulate central Vision loss on people with normal Vision. Experimental results show the potential use of eye tracking in detecting PRL for low Vision Rehabilitation.
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EMBC - Automatic Detection of Preferred Retinal Locus (PRL) for Low Vision Rehabilitation using Oculometrics Analysis
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and, 2018Co-Authors: Damon Wing Kee Wong, Augustinus LaudeAbstract:Low Vision Rehabilitation is an important step towards individuals with Age-related macular degeneration (AMD) regaining useful functional Vision and quality of life. One of the key steps in low Vision Rehabilitation is the determination of the preferred retinal locus (PRL). Currently, localization of PRL is performed manually though the guidance of a low Vision therapist and the process is highly time-consuming, labour-intensive and subjective. In this paper, we present an automated system to objectively and accurately locate an individual’s PRL with the aid of gaze tracking technology. We also propose a graph-based method for false fixation detection to improve the system robustness. We validated the reliability of the system by using eye tracking technology to simulate central Vision loss on people with normal Vision. Experimental results show the potential use of eye tracking in detecting PRL for low Vision Rehabilitation.
Eli Peli - One of the best experts on this subject based on the ideXlab platform.
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EMBC - Development and evaluation of Vision Rehabilitation devices
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and, 2011Co-Authors: Eli PeliAbstract:We have developed a range of Vision Rehabilitation devices and techniques for people with impaired Vision due to either central Vision loss or severely restricted peripheral visual field. We have conducted evaluation studies with patients to test the utilities of these techniques in an effort to document their advantages as well as their limitations. Here we describe our work on a visual field expander based on a head mounted display (HMD) for tunnel Vision, a Vision enhancement device for central Vision loss, and a frequency domain JPEG/MPEG based image enhancement technique. All the evaluation studies included visual search paradigms that are suitable for conducting indoor controllable experiments.
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Development and evaluation of Vision Rehabilitation devices
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011Co-Authors: Eli PeliAbstract:We have developed a range of Vision Rehabilitation devices and techniques for people with impaired Vision due to either central Vision loss or severely restricted peripheral visual field. We have conducted evaluation studies with patients to test the utilities of these techniques in an effort to document their advantages as well as their limitations. Here we describe our work on a visual field expander based on a head mounted display (HMD) for tunnel Vision, a Vision enhancement device for central Vision loss, and a frequency domain JPEG/MPEG based image enhancement technique. All the evaluation studies included visual search paradigms that are suitable for conducting indoor controllable experiments.
Karen Searcey - One of the best experts on this subject based on the ideXlab platform.
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characteristics of low Vision Rehabilitation services in the united states
Archives of Ophthalmology, 2009Co-Authors: Cynthia Owsley, Gerald Mcgwin, Nicole Wasserman, Karen SearceyAbstract:Objectives To describe characteristics of services, providers, and patients in low-Vision Rehabilitation entities serving adults in the United States. Methods Entities (excluding Veterans Affairs clinics) were identified through professional associations, Web searches, and a telephone survey to retina practices. A census obtained information on entity types, provider types, Rehabilitation services available, and clientele. Surveys were administered by telephone, fax, e-mail, or mail, whichever was preferred by the respondent. Results A total of 1228 low-Vision Rehabilitation service entities were identified, with 608 surveyed (49.5% response rate). Almost half (42.7%) were private optometry practices. State agencies had the highest number of clients per week (45.0 clients per week) whereas private optometry practices had the lowest (4.1 clients per week). Most (≥88.0%) established Rehabilitation goals, fit optical aids with basic training, and conducted eye examinations. Scanning, eccentric viewing, orientation and mobility, and advanced device training were less commonly offered (25%-50% of entities). Central Vision impairment was the most common deficit (74.1% of clients), with age-related macular degeneration being the most common cause (67.1%). Among the clients, 85.9% had problems reading and 67.7% had problems driving; 44.9% had adjustment disorders. Almost 1 in 3 clients was aged 80 years or older. Conclusion This census for the first time characterizes usual-care low-Vision Rehabilitation services in the United States for nonveteran adults.
Robert W Massof - One of the best experts on this subject based on the ideXlab platform.
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Low Vision Rehabilitation in a Nursing Home Population: The SEEING Study.
Journal of Visual Impairment & Blindness, 2020Co-Authors: James Deremeik, Robert W Massof, A T Broman, David S Friedman, Sheila K West, W Park, Kevin D Frick, Karen Bandeen-roche, Beatriz MunozAbstract:As part of a study of 198 residents with low Vision in 28 nursing homes, 91 participated in a low Vision Rehabilitation intervention. Among the Rehabilitation participants, 78% received simple environmental modifications, such as lighting; 75% received low Vision instruction; 73% benefited from staff training; and 69% received simple nonoptical devices. Because of the cognitive and physical fragility of many nursing home residents, the authors recommend an approach that centers on training nursing home staff and improving the environment of the facilities, especially in the area of illumination.
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interpretation of low Vision Rehabilitation outcome measures
Optometry and Vision Science, 2013Co-Authors: Robert W Massof, Joan A StelmackAbstract:ABSTRACTPurposeThis article presents a theoretical interpretation of patient-reported outcomes of low-Vision Rehabilitation (LVR) using rating scale questionnaires and uses previously published results of LVR outcome studies to illustrate theoretical points and validate assumptions.TheoryPatients’ j
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low Vision Rehabilitation in a nursing home population the seeing study
Journal of Visual Impairment & Blindness, 2007Co-Authors: James Deremeik, Robert W Massof, A T Broman, David S Friedman, Sheila K West, W Park, Karen Bandeenroche, Kevin D Frick, Beatriz MunozAbstract:Visual impairment (that is, blindness or low Vision) increases dramatically with age, such that an estimated 250,000 new cases are reported annually among persons aged 65 and older in the United States (Massof, 2002). Furthermore, in the United States, the prevalence of individuals with a visual acuity of worse than 20/40 is 2.76%, with increasing prevalence with age (Eye Diseases Prevalence Group, 2004). Individuals who are blind or have low Vision encounter increased difficulty maintaining their independence in a variety of areas, including activities of daily living (ADLs) and mobility (Rubin, Roche, Prasada-Rao, & Fried, 1994; Watson, 2001). Although low Vision is not correctable, Rehabilitation services can improve functioning in those who have it. These services are not mandated by law, despite the great need. However, the increased prevalence of Vision loss and the need for low Vision Rehabilitation prompted the U.S. National Institutes of Health (2000) to include low Vision Rehabilitation services as one of its goals for its program Healthy People 2010, which is a national health promotion and disease prevention initiative that challenges individuals, communities, and professionals to take specific steps to ensure increased quality and years of healthy life and eliminate health disparities among people in the United States. If a community does not have low Vision specialists, access to low Vision Rehabilitation is difficult for that community's older persons who may have to travel great distances for treatment. As the population ages and the number of nursing home residents with low Vision rises, the Rehabilitation needs of this population will increase (Horowitz, 1994; Mitchell, Hayes, & Wang, 1997). Federally funded programs, such as the Aid to the Independent Elderly Blind, which is intended to maintain the independence of elderly people in their current living situations, specifically exclude nursing home facilities. Services that do exist for nursing home residents with low Vision are limited. An example of such a service is the Talking Book program of the National Library Service for the Blind and Physically Handicapped, Library of Congress, which some nursing home facilities use. Services may not be based on an assessment of the residents’ level of function and the tasks for which Vision is needed. The literature on the prevalence of low Vision and the associated deficit of performance on ADLs by institutionalized adults describes the impact of low Vision (De Winter, Hoyng, Froeling, Meulendijks, & Van der Wilt, 2004; Marx, Werner, Cohen-Mansfield, & Feldman, 1992). De Winter et al. compared the function of elderly nursing home residents who had low Vision devices and those who did not have low Vision devices, but the sample was too small to detect significant differences. Marx et al. surveyed 103 nursing home residents with good cognition and found that a significantly greater proportion of residents with low Vision than of those with good Vision were dependent on caregivers for performing ADLs. No age adjustment was done in this sample, and it was unclear whether the residents had received any Rehabilitation as part of the study. In the context of a clinical trial of Vision restoration and Rehabilitation services for nursing home residents, we provided low Vision services to residents in randomly selected nursing homes. The low Vision specialist for this study, the first author, has a master's degree in Rehabilitation of persons who are visually impaired and is a certified low Vision therapist. The low Vision intervention presented in this article was a component of a larger intervention, the Salisbury Eye Evaluation in Nursing Home Groups (SEEING) Study, that included ophthalmologic screening, examination, refraction, and cataract surgery when appropriate; this process was described in more detail in an earlier publication (West et al., 2003). This article describes the characteristics of residents in 28 nursing homes on the Eastern Shore of Maryland and Delaware who were found to have low Vision, the proportion of these residents who agreed to low Vision Rehabilitation or other types of intervention, and the residents’ need for and goals of low Vision Rehabilitation.
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measuring outcomes of Vision Rehabilitation with the veterans affairs low Vision visual functioning questionnaire
Investigative Ophthalmology & Visual Science, 2006Co-Authors: Joan A Stelmack, Janet P Szlyk, Thomas R Stelmack, Paulette Demersturco, Tracy R Williams, Danna Moran, Robert W MassofAbstract:PURPOSE. To evaluate the sensitivity to change, in patients who undergo Vision Rehabilitation, of the Veteran Affairs (VA) Low Vision Visual Functioning Questionnaire (LV VFQ-48), which was designed to measure the difficulty visually impaired persons have in performing daily activities and to evaluate Vision Rehabilitation outcomes. METHODS. Before and after Rehabilitation, the VA LV VFQ-48 was administered by telephone interview to subjects from five sites in the VA and private sector. Visual acuity of these subjects ranged from near normal to total blindness. RESULTS. The VA LV VFQ exhibited significant differential item functioning (DIF) for 7 of 48 items (two mobility tasks, four reading tasks, and one distance-Vision task). However, the DIF was small relative to baseline changes in item difficulty for all items. Therefore, the data were reanalyzed with the constraint that item difficulties do not change with Rehabilitation, which assigns all changes to the person measure. Subjects in the inpatient Blind Rehabilitation Center (BRC) program showed the largest changes in person measures after Vision Rehabilitation (effect size = 1.9; t-test P < 0.0001). The subjects in the outpatient programs exhibited smaller changes in person measures after Rehabilitation (effect size = 0.29; t-test P < 0.01). There was no significant change in person measures for the control group (test-retest before Rehabilitation). CONCLUSIONS. In addition to being a valid and reliable measure of visual ability, the VA LV VFQ-48 is a sensitive measure of changes that occur in visual ability as a result of Vision Rehabilitation. Patients' self-reports of the difficulty they experience performing daily activities measured with this instrument can be used to compute a single number, the person measure that can serve as an outcome measure in clinical studies. The VA LV VFQ-48 can be used to compare programs that offer different levels of intervention and serve patients across the continuum of Vision loss.
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measuring low Vision Rehabilitation outcomes with the nei vfq 25
Investigative Ophthalmology & Visual Science, 2002Co-Authors: Thomas R Stelmack, Joan A Stelmack, Robert W MassofAbstract:PURPOSE. To evaluate the sensitivity of the National Eye Institute Visual Functioning Questionnaire-25 (NEI VFQ-25) to change in visual abilities after low-Vision Rehabilitation in two different Veterans Administration (VA) low-Vision programs METHODS. Seventy-seven legally blind veterans from the Blind Rehabilitation Center (BRC) at Hines VA Hospital and 51 partially sighted veterans from the Visual Impairment Center to Optimize Remaining Sight (VICTORS) program at the Chicago Health Care Network, West Side DiVision, were administered the NEI VFQ-25 plus supplement in interview format at admission and discharge. Instructions for administration were modified to have study participants answer all the questions as if they were wearing glasses or contact lenses or were using low-Vision devices. Interval measures of person ability and item difficulty were estimated from the patients' responses to 34 of the 39 items on the VFQ-25 plus supplement before and after Rehabilitation, by the polytomous rating scale measurement model of Wright and Masters. RESULTS. In VICTORS patients, item order by difficulty before Rehabilitation agreed with item order for BRC patients. Visual ability scales are used similarly by different patients with different degrees of low Vision. Based on preRehabilitation person measure distributions, VICTORS patients were less disabled, as would be predicted by visual acuity, than were BRC patients. After Rehabilitation, estimated item difficulty for 4 of the 34 items decreased significantly in both BRC and VICTORS patients. CONCLUSIONS. The present study demonstrates that the NEI VFQ-25 plus supplement can be used to measure the effects of low-Vision Rehabilitation; however, only 7 of the 34 items tested are sensitive to change after Rehabilitation. Targeted activities, such as reading ordinary print, small print, and street signs are easier to perform for graduates of both programs after Rehabilitation. The patients' visual ability also shows improvement in both BRC and VICTORS. Improvement in visual ability is independent of change in difficulty of targeted items. Although this was not a controlled clinical trial, the decrease in difficulty of targeted items may reflect the use of low-Vision aids and training to make tasks easier. The change in visual ability may reflect positive outcomes of Rehabilitation or may he the consequence of patients' overestimates of their functional ability at the time of discharge.
Khadija S Shahid - One of the best experts on this subject based on the ideXlab platform.
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low Vision Rehabilitation an update
Saudi Journal of Ophthalmology, 2017Co-Authors: Mark E Wilkinson, Khadija S ShahidAbstract:This article provides information concerning issues related to the care of individuals who are visually impaired. Issues reviewed include determining who should be referred for Vision Rehabilitation services, Charles Bonnet syndrome, visual acuity, contrast sensitivity and visual field testing along with Useful Field of View testing. This article also discusses technology advances that can enhance the visual functioning of individuals who are visually impaired, including how these advances can help drivers with visual impairments to continue to safely operate motor vehicles, at least on a limited basis. Finally, resources that are available to both encourage and motivate patients to take advantages of Vision Rehabilitation services are reviewed.
