The Night Vision Aid for Legally Blind People with Night Blindness: An Evaluation

1983 ◽  
Vol 77 (2) ◽  
pp. 67-70 ◽  
Author(s):  
Diane L. Morrissette ◽  
Gregory L. Goodrich
Keyword(s):  
Night Blindness ◽  
Night Vision ◽  
Blind People ◽  
Wide Angle ◽  
Additional Information ◽  
Orientation And Mobility ◽  
Mobility Aid ◽  
Measures Of Performance

The Night Vision Aid (NVA) was evaluated to determine its effectiveness as an orientation and mobility (O&M) aid for legally blind people with night blindness. Twenty-four subjects walked a prescribed route during the day and at night without the NVA, and also at night with the NVA. They also walked a different route using the Wide Angle Mobility Light (WAML) to provide additional information on a second night mobility aid. Measures of performance are described. On the average, the NVA did not significantly improve the subjects’ mobility at night; the majority of them preferred the WAML.

Night Vision Aid Option: Streamlights

1986 ◽  
Vol 80 (10) ◽  
pp. 1005-1006
Author(s):  
V. L. Mosler
Keyword(s):  
Visually Impaired ◽  
Night Blindness ◽  
Night Vision ◽  
Wide Angle ◽  
School Aged Children ◽  
Hands On ◽  
Visually Impaired Persons

Other authors have compared commercially available night vision aids used by visually impaired persons who have night blindness. The Wide Angle Mobility Lantern (WAML) is usually the more recommended device. This article suggests that other night vision aids, as yet unmentioned in the literature, may be equally effective and sometimes preferred to the WAML. Lights in the Streamlight series are comparable in price and size to the WAML and are more widely available. Personnel working with school-aged children who are night blind are encouraged to provide them with information about, and hands-on experience with, various night vision aids.

Evaluation of Two Night–Vision Devices

1990 ◽  
Vol 84 (10) ◽  
pp. 539-541
Author(s):  
J. Robinson ◽  
S.M. Story ◽  
T. Kuyk
Keyword(s):  
High Intensity ◽  
Night Blindness ◽  
Visual Impairments ◽  
Visual Fields ◽  
Night Vision ◽  
Wide Angle ◽  
Blind Individuals ◽  
High Intensity Light

Night-blind individuals often have restricted visual fields or other visual impairments that limit their ability to travel at night. The study reported here compared two night-vision devices: one wide-angle light and one with a high-intensity beam. It concluded that no one night light is best for all individuals and that depending on the cause of the night blindness, a smaller angle, high-intensity light may be more useful than a wider angle one.

Four Years’ Use of the Binaural Sensory Aid

1975 ◽  
Vol 69 (1) ◽  
pp. 7-10
Author(s):  
Walter Thornton
Keyword(s):  
Field Tests ◽  
Auditory Signal ◽  
Blind People ◽  
New Model ◽  
Orientation And Mobility ◽  
Environmental Sensor ◽  
Mobility Aid

After using the binaural sensory aid in conjunction with the long cane for years, the writer feels that his orientation and mobility have improved, that he experiences less stress and is therefore more willing to cope with travel situations he would previously have avoided, and that he has developed to some extent the ability to interpret the device's signals (to determine what object causes a particular auditory signal). He believes that a new model of the aid, Mark II, currently undergoing field tests, is superior to the various models of Mark I and that the binaural sensory aid, while not the perfect solution to all the mobility problems of blind people, is a successful mobility aid and environmental sensor.

A Study of the Effectiveness of the Wide Angle Mobility Light

1985 ◽  
Vol 79 (3) ◽  
pp. 109-111 ◽  
Author(s):  
Diane L. Morrisette ◽  
Gregory L. Goodrich ◽  
Michael F. Marmor
Keyword(s):  
Night Blindness ◽  
Visual Fields ◽  
Error Rates ◽  
Night Vision ◽  
Wide Angle

The Wide Angle Mobility Light (WAML) is a commercially available night vision aid. The present study tested the effectiveness of the device in helping night-blind subjects walk a course of residential streets at night. It was found that the WAML significantly reduced error rates ( p< .05). The results suggest that the WAML can be a useful device for most individuals who have night blindness with constricted peripheral visual fields.

scholarly journals Substantial restoration of night vision in adult mice with congenital stationary night blindness

2021 ◽  
Author(s):  
Juliette Varin ◽  
Nassima Bouzidi ◽  
Gregory Gauvain ◽  
Corentin Joffrois ◽  
Melissa Desrosiers ◽  
...  
Keyword(s):  
Night Blindness ◽  
Night Vision ◽  
Congenital Stationary Night Blindness ◽  
Adult Mice

scholarly journals Study on the limitations of travel-time inversion applied to sub-basalt imaging

Solid Earth ◽  
2013 ◽  
Vol 4 (2) ◽  
pp. 543-554 ◽  
Author(s):  
I. Flecha ◽  
R. Carbonell ◽  
R. W. Hobbs
Keyword(s):  
Oil Industry ◽  
Velocity Model ◽  
Time Inversion ◽  
Wide Angle ◽  
Seismic Reflection Data ◽  
Additional Information ◽  
Velocity Models ◽  
Reflection Data ◽  
Travel Time Inversion ◽  
Tomographic Inversions

Abstract. The difficulties of seismic imaging beneath high velocity structures are widely recognised. In this setting, theoretical analysis of synthetic wide-angle seismic reflection data indicates that velocity models are not well constrained. A two-dimensional velocity model was built to simulate a simplified structural geometry given by a basaltic wedge placed within a sedimentary sequence. This model reproduces the geological setting in areas of special interest for the oil industry as the Faroe-Shetland Basin. A wide-angle synthetic dataset was calculated on this model using an elastic finite difference scheme. This dataset provided travel times for tomographic inversions. Results show that the original model can not be completely resolved without considering additional information. The resolution of nonlinear inversions lacks a functional mathematical relationship, therefore, statistical approaches are required. Stochastic tests based on Metropolis techniques support the need of additional information to properly resolve sub-basalt structures.

Cooperative Car Video Share and Search System

2015 ◽  
Vol 764-765 ◽  
pp. 853-857
Author(s):  
Ming Fong Tsai ◽  
Sheng Wei Huang ◽  
Chui Ming Chiu ◽  
Li Da Sun ◽  
Ce Kuen Shieh
Keyword(s):  
Night Vision ◽  
Wide Angle ◽  
Search System ◽  
High Quality

The car video can protect the driver by clarifying the liability in the event of an accident. More and more devices and functions have been on sale for drivers in recent years. They are focused on high quality images, wide angle support and night vision functions. However, those technologies cannot help to clarify the accident liability when the sight and angle are obscured by neighbouring cars or buildings. Hence, this paper proposes the Cooperative Car Video Share and Search (CCVSS) system. The car video will be uploaded frequently, including position, heading and timestamp information on each car in the CCVSS system. Hence, the driver can search for neighbouring cars’ videos when an accident happens using the above information. This paper implements a system to help the driver to upload the car video and obtain neighbouring cars’ videos via a smartphone device.Keywords—cooperative; car video; smartphone device

scholarly journals Study on the limitations of traveltime inversion in the presence of extreme velocity anomalies

2013 ◽  
Vol 5 (1) ◽  
pp. 189-226
Author(s):  
I. Flecha ◽  
R. Carbonell ◽  
R. W. Hobbs
Keyword(s):  
Oil Industry ◽  
Velocity Model ◽  
Wide Angle ◽  
Seismic Reflection Data ◽  
Traveltime Inversion ◽  
Additional Information ◽  
Velocity Models ◽  
Reflection Data ◽  
Velocity Anomalies ◽  
Tomographic Inversions

Abstract. The difficulties of seismic imaging beneath high velocity structures are widely recognised. In this setting, theoretical analysis of synthetic wide-angle seismic reflection data indicates that velocity models are not well constrained. A two-dimensional velocity model was built to simulate a simplified structural geometry given by a basaltic wedge placed within a sedimentary sequence. This model reproduces the geological setting in areas of special interest for the oil industry as the Faroe-Shetland Basin. A wide-angle synthetic dataset was calculated on this model using an elastic finite difference scheme. This dataset provided travel times for tomographic inversions. Results show that the original model can not be completely resolved without considering additional information. The resolution of nonlinear inversions lacks a functional mathematical relationship, therefore, statistical approaches are required. Stochastical tests based on Metropolis techniques support the need of additional information to properly resolve subbasalt structures.

Validation of an eBAT as a mobility aid for blind people

2020 ◽  
pp. 1-9
Author(s):  
David Abreu ◽  
Benito Codina ◽  
Jonay Toledo ◽  
Arminda Suárez
Keyword(s):  
Blind People ◽  
Mobility Aid
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