Evidence map›Paper›PMID 34706764›Full record

ArticleInternational journal of retina and vitreous2021

Argus II retinal prosthesis for retinitis pigmentosa in the Middle East: The 2015 Pan-American Association of Ophthalmology Gradle Lecture.

J Fernando Arevalo, Saba Al Rashaed, Tariq A Alhamad, Eman Al Kahtani, Hassan A Al-Dhibi, KKESH Collaborative Retina Study Group

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in International journal of retina and vitreous, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT00407602 (Argus® II Retinal Stimulation System Feasibility Protocol), which is not on this map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
0.8field-weighted citation impact, top 32% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT00407602 nacompletednot on this map

Argus® II Retinal Stimulation System Feasibility Protocol

TypeinterventionalSponsorSecond Sight Medical ProductsRan2006 to 2019Enrolled30ConditionsRetinitis PigmentosaArmsImplant of Argus II Retinal Prosthesis
3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 14 citations in OpenAlex.

  1. Review
  2. Motion perception with visual prostheses.Progress in biomedical engineering (Bristol, England) · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 2 countries.

J Fernando Arevalo *Vitreoretinal Division, King Khaled Eye Specialist Hospital, P. O. Box 7191, Riyadh, 11462, Saudi Arabia.
Saba Al Rashaed *Vitreoretinal Division, King Khaled Eye Specialist Hospital, P. O. Box 7191, Riyadh, 11462, Saudi Arabia.
Tariq A AlhamadVitreoretinal Division, King Khaled Eye Specialist Hospital, P. O. Box 7191, Riyadh, 11462, Saudi Arabia.
Eman Al KahtaniVitreoretinal Division, King Khaled Eye Specialist Hospital, P. O. Box 7191, Riyadh, 11462, Saudi Arabia.
Hassan A Al-DhibiVitreoretinal Division, King Khaled Eye Specialist Hospital, P. O. Box 7191, Riyadh, 11462, Saudi Arabia. hdhibi@kkesh.med.sa.
KKESH Collaborative Retina Study Group
King Khaled Eye Specialist Hospital · SAJohns Hopkins University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTo describe the outcomes of patients with retinitis pigmentosa (RP) who received the Argus II Retinal Prosthesis System.

methodsThis retrospective, interventional case series evaluated 10 consecutive patients who received the Argus II retinal implant and underwent visual function tests with the system on and system off. The main outcome measures were safety (the number, seriousness, and relatedness of adverse events), and visual function measured by computer-based objective tests, including square localization (SL) and direction of motion (DOM). Secondary measures included functional vision performance, including orientation and mobility (O&M) tasks.

resultsThere were no intraoperative complications and all prostheses remained implanted at the end of follow up. The mean patient age was 41.3 years; mean duration of the implant in vivo was 2.1 years. One patient had a suture exposure over the coil suture tab and over the inferior case suture tab at 2 years postoperatively, which was managed successfully. One patient developed mild vitreous hemorrhage that resolved spontaneously. One patient developed high intraocular pressure postoperatively due to a tight scleral band (SB) that was managed successfully. Patients performed significantly better with the Argus II system on than off on all tasks.

conclusionPatients who received the Argus II had a safety profile out to 4 years post-implantation that was markedly better than that observed in the pre-approval phase of the Argus II. In this population of RP patients, the Argus II retinal prosthesis provided useful visual function over several years that likely translates into improved quality of life.

trial registrationclinicaltrials.gov identifier, NCT00407602.

Indexed as

Argus IIBlindnessFunctional visionRetinal prosthesisRetinitis pigmentosa

Identifiers

PMID34706764
PMCPMC8554988
OpenAlexW3209446819

What OpenQuestion holds

Textmetadata
LicenceCC BY
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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.