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Prism

Prism Glasses for Visual Field Loss

N/A
Recruiting
Led By Eliezer Peli, MSc, OD
Research Sponsored by Massachusetts Eye and Ear Infirmary
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
Able to independently walk short distances
Visual field loss, either peripheral field loss or hemianopic field loss
Timeline
Screening 3 weeks
Treatment Varies
Follow Up through study completion, an average of four months
Awards & highlights

Study Summary

This trial will help develop better prism glasses for people with visual field loss, to assist with obstacle detection while walking.

Who is the study for?
This trial is for people with certain types of visual field loss, like tunnel vision or hemianopia. Participants must have at least 20/50 vision in their better eye, be able to walk on their own, speak English, and complete sessions up to 4 hours. It's not for those with recent seizures, balance issues that affect walking, cognitive problems, or hemispatial neglect.Check my eligibility
What is being tested?
The study tests various high-power prism configurations designed to widen the visual field and help detect obstacles while walking. Participants will visit Schepens Eye Research Institute multiple times for fitting/testing these new prism glasses to find the best designs for future use.See study design
What are the potential side effects?
While specific side effects are not detailed here as it's a feasibility test rather than a drug trial, participants may experience discomfort or disorientation when adjusting to the new prism glasses.

Eligibility Criteria

Inclusion Criteria

You may be eligible if you check “Yes” for the criteria below
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I can walk on my own for short distances.
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I have lost some of my field of vision.

Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~through study completion, an average of four months
This trial's timeline: 3 weeks for screening, Varies for treatment, and through study completion, an average of four months for reporting.

Treatment Details

Study Objectives

Outcome measures can provide a clearer picture of what you can expect from a treatment.
Primary outcome measures
Field of view expansion
Secondary outcome measures
Pedestrian detection rate

Trial Design

1Treatment groups
Experimental Treatment
Group I: High power prismsExperimental Treatment1 Intervention
Various configurations of high power prisms will be developed for each individual and custom fit into spectacles lenses.

Find a Location

Who is running the clinical trial?

Massachusetts Eye and Ear InfirmaryLead Sponsor
106 Previous Clinical Trials
12,929 Total Patients Enrolled
National Eye Institute (NEI)NIH
547 Previous Clinical Trials
1,402,137 Total Patients Enrolled
Eliezer Peli, MSc, ODPrincipal Investigator - Schepens Eye Research Institute of Massachusetts Eye and Ear
Massachusetts Eye and Ear Infirmary

Media Library

High power prisms (Prism) Clinical Trial Eligibility Overview. Trial Name: NCT04424979 — N/A
Visual Field Loss Research Study Groups: High power prisms
Visual Field Loss Clinical Trial 2023: High power prisms Highlights & Side Effects. Trial Name: NCT04424979 — N/A
High power prisms (Prism) 2023 Treatment Timeline for Medical Study. Trial Name: NCT04424979 — N/A
Visual Field Loss Patient Testimony for trial: Trial Name: NCT04424979 — N/A

Frequently Asked Questions

These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.

Are there any specific criteria for patient selection into this research endeavor?

"This medical trial requires 20 test subjects between the ages of 7 and 80 that have tunnel vision. Other relevant requirements include: ambulation capacity, good health to withstand sessions lasting 2-4 hours, visual field loss (hemianopic or peripheral), and a minimum acuity of 20/50 in the better eye."

Answered by AI

Are there any openings left for this medical experiment?

"According to clinicaltrials.gov, this current research endeavour is actively seeking applicants. It was initially advertised on November 6th 2020 and the most recent information posted dates back to November 24th 2021."

Answered by AI

How many individuals have opted to take part in this clinical experiment?

"Affirmative. The clinical trial portal shows that this research, which was originally advertised on 6th November 2020, is currently looking for participants. A total of 20 people are needed from 1 medical centre."

Answered by AI

Are adults over the age of 25 eligible to participate in this investigation?

"This particular clinical trial is open to participants aged 7-80. Specifically, there are 6 studies available for minors and 10 trials tailored to seniors over the age of 65."

Answered by AI

Who else is applying?

What state do they live in?
Texas
What portion of applicants met pre-screening criteria?
Did not meet criteria
How many prior treatments have patients received?
0

Why did patients apply to this trial?

Suffering from right hemianopia, tried Peli Prisms which are difficult to adjust to so any other options would be of consirable help. Stroke 10 months ago.
PatientReceived no prior treatments
Recent research and studies
clinicaltrials.govStudy
Feasibility Tests for Various Prism Configurations for Visual Field Loss
Eli Peli 2020. "Feasibility Tests for Various Prism Configurations for Visual Field Loss". ClinicalTrials.gov. https://clinicaltrials.gov/ct2/show/NCT04424979.
~1 spots leftby Aug 2024
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