CompletedNot Applicable

Clinical Trial of Peripheral Prism Glasses for Hemianopia

United States, United Kingdom73 participantsStarted 2007-09

Plain-language summary

The purpose of this study is to evaluate the functional utility for general mobility (walking) of new high power permanent peripheral prism glasses, which provide visual field expansion device for patients with homonymous hemianopia (the complete loss of half the field of vision on the same side in both eyes). The efficacy of real peripheral prism glasses will be assessed relative to sham peripheral prism glasses.

Who can participate

Age range

18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * At least 18 years of age. * Sighted in both eyes, with monocular visual acuity (best corrected vision), of at least 20/50 in each eye. * Complete homonymous hemianopia of more than 3 months duration * Refractive error within the -5 dioptre to +5 dioptre range * No significant cognitive impairment * No history of wearing the Peli system of peripheral prisms for hemianopic field expansion (patients who have worn another type of prismatic correction for hemianopia such as yoked prisms or the Gottlieb VAS system can participate in the study) * No physical or mental disabilities, including cognitive dysfunction, balance problems or other deficits that could impair ability to walk or use the peripheral prism spectacles. * Able to walk (using a cane or walker is OK) or control the movements of their own wheelchair. * In sufficiently good health to attend four in-office visits. Exclusion Criteria: * Diagnosis of dementia * Diagnosis of visual neglect * History of seizures in the last 6 months * Incomplete hemianopia

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Overall Proportion Saying "Yes" to Real Prism Glasses

Timeframe: Evaluated after 4 weeks of wearing each type of prism glasses

Trial details

NCT IDNCT00494676

SponsorAlexandra Bowers

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2009-07

Results submitted2013-07-07

View on ClinicalTrials.gov More Homonymous Hemianopia trials