MedTrace Logo

Feasibility Tests for Various Prism Configurations for Visual Field Loss

NCT04424979 · Status: RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2025-09-23

No results posted yet for this study

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.

Conditions

  • Hemianopia, Homonymous
  • Tunnel Vision
  • Visual Field Defect, Peripheral
  • Visual Field Constriction Bilateral
  • Visual Field Defect Homonymous Bilateral

Interventions

DEVICE

High power prisms

High power prisms designed to shift images from blind areas into portions of the wearer's remaining, seeing, field of vision

Sponsors & Collaborators

  • National Eye Institute (NEI)

    collaborator NIH

  • Massachusetts Eye and Ear Infirmary

    lead OTHER

Principal Investigators

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

Study Design

Allocation
NA
Purpose
DEVICE_FEASIBILITY
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
7 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2020-11-06
Primary Completion
2026-08-31
Completion
2026-12-31
FDA Device
Yes

Countries

  • United States

Study Locations

More Related Trials

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 NCT04424979 on ClinicalTrials.gov