Head-mounted Devices for Low Vision: A Review

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Human-Computer Interaction

Background:

• Head-mounted devices (HMDs) are wearable technologies designed to assist individuals with low vision.
• These devices aim to enhance visual perception through magnification, illumination, expanded field of view, and contrast sensitivity.
• Technological progress has led to more portable and feature-rich HMDs over the past three decades.

Purpose of the Study:

• To provide a comprehensive overview of head-mounted devices for low-vision patients.
• To review currently available commercial HMD products.
• To discuss existing challenges and future prospects in HMD technology for visual impairment.

Main Methods:

• Literature review of HMD advancements and applications.
• Analysis of commercially available HMD products.
• Discussion of technological challenges and future research directions.

Main Results:

• HMDs offer diverse visual enhancement strategies, including magnification, illumination, and contrast adjustment.
• Modern HMDs incorporate advanced features like augmented reality, virtual reality, text-to-speech, and blind spot remapping.
• Key challenges include high cost, patient-specific customization needs, and social acceptance.

Conclusions:

• HMDs represent a significant advancement in assistive technology for low vision.
• Continued innovation is needed to address cost, customization, and societal integration.
• Future research should focus on overcoming current limitations to improve accessibility and efficacy.