The researchers of U.S.A have created a wearable device that can be used to detect objects around people with peripheral vision, which would help the to walk freely without any collisions.The loss in peripheral vision occurs due to retinitis, pigmentosa, glaucoma, or brain injury. These people often face mobility challenges and increased likelihood of falls and collisions.
As therapeutic vision restoration treatments are still under development, rehabilitation can only be achieved using assisting technologies which are alternatives for overcoming mobility challenges related to vision loss. Researchers from Massachusetts Eye and Ear, Schepens Eye Research Institute used an obstacle course to evaluate a wearable collision warning device they developed for patients with peripheral vision loss.
They found that this device may help patients with a wide range of vision loss to avoid collisions with high-level obstacles. Their findings are featured on Investigative Ophthalmology and Visual Science (IOVS).
The senior author Gang Luo, Associate Scientist at Mass. Eye and Ear/Schepens, and Assistant Professor of Ophthalmology at Harvard Medical School said that "We developed this pocket-sized collision warning device, which can predict impending collisions based on time to collision rather than proximity. It gives warnings only when the users approach to obstacles, not when users stand close to objects and not when moving objects just pass by. So, the auditory collision warnings given by the device are simple and intuitively understandable.
We tested the device in a density obstacle course to evaluate its effect on collision avoidance in people with peripheral vision loss. To show its beneficial effect, we compared the patients' mobility performance with the device and without it. Just demonstrating the device can give warning for obstacles in walking would not prove the device is useful. We have to compare with a baseline, which is walking without the device in this case."
Twenty five patients with tunnel vision or hemianopia completed the obstacle course study and the number of collisions and walking speed were measured. Compared to walking without the device, collisions were reduced significantly by about 37 per cent with the device and walking speed barely changed. No patient had more collisions when using the device than when not using it.
Luo also said that they are excited about the device's potential value for helping visually impaired and completely blind people walk around safely and their next job will be to test its usefulness in patients' daily lives in a clinical trial study," .
Source: Mumbai Mirror
As therapeutic vision restoration treatments are still under development, rehabilitation can only be achieved using assisting technologies which are alternatives for overcoming mobility challenges related to vision loss. Researchers from Massachusetts Eye and Ear, Schepens Eye Research Institute used an obstacle course to evaluate a wearable collision warning device they developed for patients with peripheral vision loss.
They found that this device may help patients with a wide range of vision loss to avoid collisions with high-level obstacles. Their findings are featured on Investigative Ophthalmology and Visual Science (IOVS).
The senior author Gang Luo, Associate Scientist at Mass. Eye and Ear/Schepens, and Assistant Professor of Ophthalmology at Harvard Medical School said that "We developed this pocket-sized collision warning device, which can predict impending collisions based on time to collision rather than proximity. It gives warnings only when the users approach to obstacles, not when users stand close to objects and not when moving objects just pass by. So, the auditory collision warnings given by the device are simple and intuitively understandable.
We tested the device in a density obstacle course to evaluate its effect on collision avoidance in people with peripheral vision loss. To show its beneficial effect, we compared the patients' mobility performance with the device and without it. Just demonstrating the device can give warning for obstacles in walking would not prove the device is useful. We have to compare with a baseline, which is walking without the device in this case."
Twenty five patients with tunnel vision or hemianopia completed the obstacle course study and the number of collisions and walking speed were measured. Compared to walking without the device, collisions were reduced significantly by about 37 per cent with the device and walking speed barely changed. No patient had more collisions when using the device than when not using it.
Luo also said that they are excited about the device's potential value for helping visually impaired and completely blind people walk around safely and their next job will be to test its usefulness in patients' daily lives in a clinical trial study," .
Source: Mumbai Mirror
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