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Clinical Trial of Multi-Periscopic Prism Glasses for Hemianopia

NCT04827147 · Status: ACTIVE_NOT_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 64

Last updated 2026-03-13

Study results available
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Summary

This clinical trial will evaluate the efficacy of two types of high-power prism glasses that provide field of view expansion for patients with homonymous hemianopia (the complete loss of half the field of vision on the same side in both eyes).

Conditions

  • Homonymous Hemianopia

Interventions

DEVICE

Multi-Periscopic Prism (MPP) glasses

Spectacles with multi-periscopic prisms mounted as oblique peripheral prism segments

DEVICE

Fresnel Peripheral Prism (FPP) glasses

Spectacles with conventional permanent Fresnel prisms mounted as oblique peripheral prism segments

Sponsors & Collaborators

  • National Eye Institute (NEI)

    collaborator NIH

  • Massachusetts Eye and Ear Infirmary

    lead OTHER

Principal Investigators

  • Eli Peli, OD MSc · Schepens Eye Research Institute of Massachusetts Eye and Ear

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
CROSSOVER

Eligibility

Min Age
7 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2022-10-03
Primary Completion
2025-04-30
Completion
2026-04-30
FDA Device
Yes

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04827147 on ClinicalTrials.gov