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Keep this study
Lead
Massachusetts Eye and Ear Infirmary
Participants with blindness or severe visual field loss (hemianopia or tunnel vision) will be trained to use a collision warning device that alerts them to impending collisions. Participants will use the device at home during everyday mobility for about 1 month. The device is designed to supplement existing mobility devices, such as a long cane or dog guide. The device will provide warnings about potential collisions with mid- or high-level obstacles (which are typically not detected by a long cane).
Age
18–any
Sex
ALL
Healthy volunteers
Accepted
You may be eligible if
Blindness (or very limited vision with visual acuity no better than "counting fingers"),
Or severe peripheral field loss / tunnel vision (≤ 40° remaining visual field) with visual acuity of at least 20/200,
Or homonymous hemianopia with visual acuity of at least 20/200;
Able to walk independently either with or without mobility aids such as a long cane or guide dog (but without the aid of a sighted guide);
Reports at least minor bumps or collisions within the last 3 months;
You may not be if
Currently participating in a mobility training program
Diagnosed dementia
Significant cognitive decline
Participants with hemianopia will be excluded if they have hemianopia for less than 3 months and/or have spatial neglect
