20 Participants Needed

Prism Glasses for Visual Field Loss

AB
SM
Overseen BySailaja Manda
Age: Any Age
Sex: Any
Trial Phase: Academic
Sponsor: Massachusetts Eye and Ear Infirmary
No Placebo GroupAll trial participants will receive the active study treatment (no placebo)

What You Need to Know Before You Apply

What is the purpose of this trial?

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.

Who Is on the Research Team?

EP

Eliezer Peli, MSc, OD

Principal Investigator

Schepens Eye Research Institute of Massachusetts Eye and Ear

Are You a Good Fit for This Trial?

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.

Inclusion Criteria

I can complete activities lasting 2-4 hours without major issues.
You must be able to see at least 20/50 in your better eye.
I can walk on my own for short distances.
See 2 more

Exclusion Criteria

I do not have any physical or mental conditions that would stop me from walking or using special glasses.
I have had a seizure in the past 6 months.
I have difficulty noticing things on one side of my body.

Timeline for a Trial Participant

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

Treatment

Participants are fitted with various configurations of high-power prisms and tested for visual field expansion and obstacle detection

4 months
4 visits (in-person)

Follow-up

Participants are monitored for safety and effectiveness after treatment

4 weeks

What Are the Treatments Tested in This Trial?

Interventions

  • High power prisms
Trial Overview 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.
How Is the Trial Designed?
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 Clinic Near You

Who Is Running the Clinical Trial?

Massachusetts Eye and Ear Infirmary

Lead Sponsor

Trials
115
Recruited
15,000+

National Eye Institute (NEI)

Collaborator

Trials
572
Recruited
1,320,000+
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