Using an Augmented Reality Device as a Distance-based Vision Aid-Promise and Limitations

Area of Science:

• Ophthalmology
• Human-Computer Interaction
• Assistive Technology

Background:

• Wearable displays offer potential for digital enhancement of visual function in people with limited vision.
• Advancements in display technologies necessitate understanding their capabilities and constraints as vision aids.

Purpose of the Study:

• To evaluate the efficacy of a consumer augmented reality (AR) device in improving functional vision for individuals with near-complete vision loss.

Main Methods:

• Developed an AR application translating spatial information into high-contrast visual patterns.
• Conducted two experiments: an exploratory study (n=4) and a main controlled study (n=48) with simulated vision loss.
• Assessed performance on visual tasks including person/object recognition, pose/gesture identification, and navigation, comparing AR-assisted vision with unaided vision.

Main Results:

• The AR application significantly improved accuracy and confidence in object recognition (P < .001) and gesture recognition (P < .05).
• No significant improvements were observed in body pose identification or subjective mobility assessments compared to a control group.

Conclusions:

• Consumer AR devices show potential for functional vision enhancement in specific tasks for visually impaired users.
• Participants with simulated and actual vision loss successfully performed tasks previously impossible without the AR system.
• Future development must address system performance, form factor limitations, and the risk of user overconfidence.