Retinal Prosthesis
Predicting the perceptual experience of retinal prosthesis patients for Retinitis Pigmentosa
N/A
Waitlist Available
Led By Michael Beyeler, PhD
Research Sponsored by University of California, Santa Barbara
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial Must have
Argus II users:
Subject has been implanted with the Argus II system
Must not have
Be younger than 18 years old
Timeline
Screening 3 weeks
Treatment Varies
Follow Upthrough study completion, an average of 1 year
Awards & highlights
No Placebo-Only Group
Study Summary
This trial will test how well patients with a retinal prosthesis can see after being given visual percepts either by electrode stimulation or by having them view a computer/projector screen.
Eligible Conditions
- Retinitis Pigmentosa
- Visual Impairment
Eligibility Criteria
Inclusion Criteria
You will be eligible if you check “Yes” for the criteria belowSelect...
You are using the Argus II device.
Select...
You have received a specific type of eye implant called the Argus II system.
Select...
You can walk without needing any help or support.
Select...
You can walk without needing any help or support.
Timeline
Screening ~ 3 weeks3 visits
Treatment ~ Varies
Follow Up ~ through study completion, an average of 1 year
Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~through study completion, an average of 1 year
Treatment Details
Study Objectives
Outcome measures can provide a clearer picture of what you can expect from a treatment.Primary outcome measures
Pattern discrimination accuracy
Phosphene brightness relative to reference stimulus
Phosphene shape
+1 moreAwards & Highlights
No Placebo-Only Group
All patients enrolled in this study will receive some form of active treatment.
Trial Design
1Treatment groups
Experimental Treatment
Group I: Predicting the perceptual experience of retinal prosthesis patientsExperimental Treatment1 Intervention
This intervention will assess the effect of different stimulation strategies on the perceptual experience of retinal prosthesis patients. We will produce visual percepts in patients either by directly stimulating electrodes (using FDA-approved pulse trains) or by asking them to view a computer or projector screen and using standard FDA-approved stimulation protocols (as is standardly used for their devices) to convert the computer or projector screen image into pulse trains on their electrodes. Existing blind users of the Argus II will be recruited for this study. Performance of Argus II users will be compared to performance of sighted subjects viewing a prosthetic vision simulation in virtual reality.
Find a site
Who is running the clinical trial?
University of California, Santa BarbaraLead Sponsor
23 Previous Clinical Trials
2,927 Total Patients Enrolled
Johns Hopkins UniversityOTHER
2,158 Previous Clinical Trials
14,817,382 Total Patients Enrolled
9 Trials studying Retinitis Pigmentosa
842 Patients Enrolled for Retinitis Pigmentosa
University of MichiganOTHER
1,717 Previous Clinical Trials
6,565,856 Total Patients Enrolled
3 Trials studying Retinitis Pigmentosa
470 Patients Enrolled for Retinitis Pigmentosa
University of MinnesotaOTHER
1,321 Previous Clinical Trials
1,502,458 Total Patients Enrolled
1 Trials studying Retinitis Pigmentosa
438 Patients Enrolled for Retinitis Pigmentosa
National Eye Institute (NEI)NIH
530 Previous Clinical Trials
1,197,954 Total Patients Enrolled
23 Trials studying Retinitis Pigmentosa
14,301 Patients Enrolled for Retinitis Pigmentosa
Michael Beyeler, PhDPrincipal Investigator
University of California, Santa BarbaraFrequently Asked Questions
These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.
Is this experiment presently enlisting participants?
"According to the clinicaltrials.gov records, this medical experiment is not presently searching for participants. Initiated on November 1st 2022, and subsequently updated in March 14th 2022, there are no open slots at present. However, 98 other tests are recruiting now."
Answered by AI
How many locations are actively conducting this experiment?
"Currently, the 4 sites recruiting participants are located in Baltimore, Santa Barbara, Minneapolis and other cities. To minimize travel burden for enrolled patients, it is beneficial to choose the closest option."
Answered by AI
Who else is applying?
How old are they?
18 - 65
What site did they apply to?
University of Michigan, Ann Arbor
University of California, Santa Barbara
What portion of applicants met pre-screening criteria?
Met criteria
Did not meet criteria
What state do they live in?
California