New prism glasses could help people with tunnel vision see more

NCT ID NCT04424979

Recruiting now Symptom relief Sponsor: Massachusetts Eye and Ear Infirmary Source: ClinicalTrials.gov ↗

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study tests special glasses with high-power prisms that shift images from blind spots into the wearer's remaining vision. Researchers will try different designs to see which best expands the field of view and helps people detect obstacles while walking. The trial involves about 20 participants with conditions like hemianopia or tunnel vision, who will attend several sessions for fitting and testing.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: high-power prism glasses
What this could lead to: If successful, these glasses could help people with tunnel vision or hemianopia see more of their surroundings and avoid obstacles while walking.
What could go wrong: This is a small, early-stage trial with only 20 participants, testing different designs. The glasses may not work well for everyone or in real-world conditions.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

Hemianopsia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

HEMIANOPIA HOMONYMOUS TUNNEL VISION VISUAL FIELD CONSTRICTION BILATERAL VISUAL FIELD DEFECT HOMONYMOUS BILATERAL VISUAL FIELD DEFECT, PERIPHERAL

Contacts and locations

Locations

Schepens Eye Research Institute
RECRUITING

Boston, Massachusetts, 02114, United States

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