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NCT05285618 · ClinicalTrials.gov registry record · NA
The Perceptual Experience of Argus II Users
A NA study, sponsored by University of California, Santa Barbara.
- Completed
- Registry status
- NA
- Development phase
- 6
- Enrollment target
NCT05285618: Completed NA study, sponsored by University of California, Santa Barbara.
NCT05285618 is a NA study that has completed, run by University of California, Santa Barbara. The registered enrollment target is 6 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (100% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT05285618, a NA study, has completed, sponsored by University of California, Santa Barbara.
- COMPLETED
- Registry status
- NA
- Development phase
- 6 participants
- Enrollment target
Study Summary
This Basic Experimental Studies Involving Humans (BESH) study investigates phosphene perception and performance factors in blind participants implanted with the Argus II retinal prosthesis system. Using paired-electrode stimulation, we analyze how phosphene shape and number are influenced by neuroanatomical factors, stimulus parameters, and spatial offsets. Additionally, we examine the causes of high current thresholds and limited spatial resolution, which impede pattern vision in Argus II devices. This research aims to provide insights for optimizing stimulation strategies and improving retinal prosthesis design.
Primary Outcome
Number of phosphenes perceived in response to paired-electrode stimulation across 5 spatial distances and 7 temporal interpulse delays. Phosphenes are brief sensations of light or visual flashes that occur in the absence of an external light source. A response is counted as a phosphene if the participant reports any visual sensation consistent with a flash of light.
Interventions
- DEVICE Argus II
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 6 participants |
| Start Date | 2022-01-11 |
| Est. Completion | 2023-08-31 |
| Phase | NA |
What the finished NCT05285618 record still lists
NCT05285618 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 6 participants, a relatively small participant target, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (100% lower).
The record links to 0 conditions, and to 1 intervention - of which Argus II is the first listed.
NCT05285618 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT05285618 about?
NCT05285618 is a clinical study titled "The Perceptual Experience of Argus II Users". This Basic Experimental Studies Involving Humans (BESH) study investigates phosphene perception and performance factors in blind participants implanted with the Argus II retinal prosthesis system. Using paired-electrode stimulation, we analyze how phosphene shape and number are influenced by neuroan...
What is the current status of trial NCT05285618?
This trial is currently completed. It is a NA study. The enrollment target is 6 participants. The study started on 2022-01-11. Estimated completion is 2023-08-31.
What interventions are being tested in trial NCT05285618?
The interventions under investigation include: Argus II (DEVICE).
Who is sponsoring clinical trial NCT05285618?
This trial is sponsored by University of California, Santa Barbara, which has 7 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT05285618's enrollment target sits among peer trials
6 1983rd of 2000 higher than 13 of 2,000 other NA trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other NA trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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