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WithdrawnNCT03919708RBIUpdated Nov 18, 2023

Amblyopia and Strabismus Detection Using Retinal Birefringence Imaging

An observational study in Amblyopia and Strabismus, sponsored by Rebiscan, Inc.. Withdrawn at 1 site in United States. Open to participants aged 2 Years to 8 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-11-18.

Sponsored by Rebiscan, Inc. · Observational

Why this study was withdrawn
Funding expired
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
0
Ages
2 Years to 8 Years
Sex
All
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Study summary

The purpose of this project is to compare the accuracy of two products at detecting amblyopia and strabismus in children. The devices will be Rebiscan's "blinq" (Pediatric Vision Scanner; PVS) and Rebiscan's RBI (Retinal Birefringence Imager).

Read the detailed description

Rebiscan is proposing a two-cohort study. The first cohort will include a population enriched for pathology in amblyopia to best assess device sensitivity, while a second cohort will be based in a primary care setting to best assess device specificity. The study will be conducted in busy, ethnically and economically diverse cites affiliated with the Retina Foundation of the Southwest (RFSW) in greater Dallas, TX area. Each child will be screened with Rebiscan's RBI device and it's PVS device in sequence, with results compared to the PVS as well as a comprehensive ophthalmic examination performed by a certified pediatric ophthalmologist in a statistically appropriate subset of screened subjects. Testing times will be assessed to compare the efficiency of the PVS and the RBI screening experiences. The percentage of children successfully completing the screening process will also be measured.

The RBI is expected to identify children with amblyopia and strabismus, without referring children who will not benefit from early treatment

02

Conditions studied

  • Amblyopia
  • Strabismus
03

In context

Amblyopia

189 studies on the registry are indexed under Amblyopia; 41 are open to participants now.

Browse Amblyopia studies →

Lead sponsor

Rebiscan, Inc. is the lead sponsor of 11 studies on the registry; 2 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
2 Years to 8 Years
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Probability sample

Study population

Children between the ages of 2-8, with no gender, race, or ethnicity restricted from enrollment.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Children who present to the participating clinics
  • Provide assent
  • Guardian provides

Exclusion criteria

Exclusion Criteria:

  • Developmental delay or cognitive deficit
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

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Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
0 participants (actual)
Patient registry
No

Groups and cohorts

  • Enriched Population

    Children between the ages of 2-8 who present to an eye clinic. Eligible and recruited children will be scanned with a PVS device and an RBI device, and then be provided with a full, gold standard eye exam by a pediatric ophthalmologist. All scans and exam should be performed within a single visit. Scans should take no longer than 20 seconds each, and ophthalmic exam should take approximately 30 minutes.

    Device: Retinal Birefringence Imager

  • Unenriched Population

    Children between the ages of 2-8 who present to a general pediatric clinic, with no history of eye disorders or amblyopia. Eligible and recruited children will be scanned with a PVS device and an RBI device, and then be provided with a full, gold standard eye exam by a pediatric ophthalmologist. All scans will be performed at a single visit, but the exam may require a follow up visit, depending on the availability of a pediatric ophthalmologist at the clinic at the time of study enrollment. Scans should take no longer than 20 seconds each, and ophthalmic exam should take approximately 30 minutes.

    Device: Retinal Birefringence Imager

Interventions

  • DeviceRetinal Birefringence Imager

    Device is a hand-help object approximately the size of a brick, and is held, by the user, 30cm away from the patient/subject. The subject peers in to an aperture that includes a fixation target that is in the shape of a smiley face. During this time, a ring of LED lights illuminates the eye and captures an image of the retina in approximately 3 seconds. The results instantaneously identify the presence of amblyopia / strabismus.

    Also known as: RBI

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What researchers measure

Primary outcomes

  1. Presence of amblyopia / strabismus

    Readouts of RBI device will be compared to clinical examination results

    Time frame: 1 single day

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Study locations

1 site
  • Retina Foundation of the Southwest
    Dallas, Texas 75231, United States
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References and documents

Individual participant data

Plan to share: Undecided

No publications or documents are linked to this record.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 18, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT03919708
Lead sponsor
Rebiscan, Inc.
Collaborators
Retina Foundation of the Southwest
Responsible party
Sponsor
First posted
Apr 18, 2019
Start date
Feb 4, 2020
Primary completion
May 31, 2023
Completion
May 31, 2023
Last update
Nov 18, 2023

Study contacts

Eileen Birch, PhD
principal investigator · Retina Foundation of the Southwest

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is withdrawn, as verified in Nov 2023. You cannot join it, but the record below documents what was studied.

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