Clinical Trial

Feasibility Tests for Various Prism Configurations for Visual Field Loss

Recruiting
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Summary
The investigators will develop and test different configurations of high-power prisms to expand the field of vision of patients with visual field loss to assist them with obstacle detection when walking. The study will involve multiple visits (typically four) to Schepens Eye Research Institute for fitting and testing with the prism glasses. The overall objective is to determine best designs and fitting parameters for implementation in prism devices for future clinical trials.
Protocol Amendment History 8 amendments
This ClinicalTrials.gov record has been amended 8 times since 2020-06-08; most recent amendment 2025-09-22.
Status change: Not Yet Recruiting → Recruiting 2020-11-20
Trial Details
NCT Number NCT04424979
Lead Sponsor Massachusetts Eye and Ear Infirmary
Collaborators: National Eye Institute (NEI)
Conditions Hemianopia, Homonymous, Tunnel Vision, Visual Field Defect, Peripheral, Visual Field Constriction Bilateral, Visual Field Defect Homonymous Bilateral
Enrollment 20 participants
Start Date 2020-11-06
Primary Completion 2026-08 (estimated)
Study Completion 2026-12 (estimated)
Updated on ClinicalTrials.gov 2025-09-23