Clinical Trial of Peripheral Prism Glasses for Hemianopia

Completed · Not applicable · Has a placebo group

Conditions studied: Homonymous Hemianopia

In brief

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.

Key facts

Study ID

NCT00494676

Run by

Alexandra Bowers

People needed

73

Starts

2007-09-01

Expected to finish

2010-04-01

Last updated by the study team

2017-04-04

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• 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.

You may not qualify if…

• Diagnosis of dementia
• Diagnosis of visual neglect
• History of seizures in the last 6 months
• Incomplete hemianopia

Where it is running

• UAB Center for Low Vision Rehabilitation — Birmingham, Alabama, United States
• Vista Center for the Blind and Visually Impaired — Palo Alto, California, United States
• Visual Health@Jupiter Eye Center — Jupiter, Florida, United States
• Emory Optical Low Vision — Atlanta, Georgia, United States
• Illinois Eye Institute — Chicago, Illinois, United States
• Indiana University School of Optometry, Low Vision Rehabilitation and Primary Care Services — Bloomington, Indiana, United States
• University of Kansas Medical Center — Prairie Village, Kansas, United States
• Schepens Eye Research Institute — Boston, Massachusetts, United States
• Vision Care Specialists, P.C. — Southborough, Massachusetts, United States
• Academy Eye Associates — Durham, North Carolina, United States
• Seven Lakes Eye Care — West End, North Carolina, United States
• NSU Oklahoma College of Optometry, — Tahlequah, Oklahoma, United States
• Manchester Royal Eye Hospital — Manchester, United Kingdom

Full record on ClinicalTrials.gov

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