ClinicalTrials.gg
CompletedNCT03406416Updated Aug 16, 2021

Study of a Suprachoroidal Retinal Prosthesis

An interventional study of 44Ch Bionic Eye Device in Retinitis Pigmentosa and Choroideremia, sponsored by Mobius Medical Pty Ltd.. Completed at 1 site in Australia. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2021-08-16.

Sponsored by Mobius Medical Pty Ltd. · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
4
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

This study is a proof of principal, to evaluate a safety and efficacy of a prototype suprachoroidal retinal implant.

Read the detailed description

Retinal visual prostheses are currently in early development as an intervention to improve functional vision in people who have become blind from retinal degenerative eye disease. This study follows on from an initial proof of concept study (n=3) between 2012 and 2014, and will test a second-generation retinal prosthesis device, which has the ability to be used outside of the laboratory environment (i.e. is fully implantable).

02

Conditions studied

  • Retinitis Pigmentosa
  • Choroideremia
03

In context

Retinitis Pigmentosa

278 studies on the registry are indexed under Retinitis Pigmentosa; 72 are open to participants now.

This study's enrollment of 4 is below the median of 27 across 179 interventional studies indexed under Retinitis Pigmentosa.

Browse Retinitis Pigmentosa studies →

Lead sponsor

This is the only study on the registry with Mobius Medical Pty Ltd. as lead sponsor.

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

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

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

  • Aged 18 years or older
  • Either gender
  • A confirmed history of outer retinal degenerative disease such as retinitis pigmentosa or choroideremia
  • Remaining visual acuity of bare light perception or less in both eyes
  • Functional inner retina (ganglion cells and optic nerve), as shown by the ability to perceive light and/or a measurable corneal electrically evoked visual response
  • A history of at least 10 years of useful form vision in the worse seeing eye

Exclusion criteria

Exclusion Criteria:

  • Optic nerve disease (history of glaucoma of More than 1 month, or history of any other optic neuropathy)
  • Diseases of the inner retina including, but not limited to, central retinal artery or vein occlusion (CRAO, CRVO), end stage diabetic retinopathy, retinal detachment, traumatic retinal damage, infectious retinal disease, inflammatory retinal disease.
  • Inability to visualise the retina due to corneal or other ocular media opacities (corneal degenerations, dense cataracts, trauma, lid malpositions)
  • Any ocular condition that predisposes the participant to rubbing their eyes
  • Cognitive deficiencies, including dementia or progressive neurological disease
  • Psychiatric disorders, including depression, as diagnosed by a qualified psychologist
  • Deafness or significant hearing loss
  • Inability to speak or understand English
  • Pregnancy
  • Presence of a cochlear implant
  • Participant enrolled in another drug or device trial for the treatment of their ocular condition
  • Poor general health, which would exclude them from obtaining a general anaesthetic
  • Unrealistic expectations of the investigational device to provide functional vision
  • Poorly controlled diabetes
  • Epilepsy
  • Unsuitable level of regular nystagmus (which would prevent ocular images from being obtained)
  • Anyone with medical devices (implanted or carried) that could cause serious health problems if compromised by electro-magnetic interference
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.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
4 participants (actual)

Study arms

  • Experimental
    Suprachoroidal retinal prosthesis

    Prototype wide view suprachoroidal retinal prosthesis

    Device: 44Ch Bionic Eye Device

Interventions

  • Device44Ch Bionic Eye Device

    Prototype wide view suprachoroidal retinal prosthesis

06

What researchers measure

Primary outcomes

  1. Number and severity of device related serious adverse events (SAEs)

    The safety of the surgical implantation assessed by the number and severity of serious adverse events (SAEs) compared to other retinal prosthesis.

    Time frame: 2 years

Secondary outcomes

  1. Efficacy - visual response

    The ability to generate a visual response accessed via repeatable threshold measurements of visual perception.

    Time frame: 2 years

  2. Visual Function and Functional Vision

    Visual function and Functional Vision will be scored from performance on a range of acuity, orientation and mobility, and activities of daily living tasks. Outcome measures include: 1. Grating visual acuity: record the grating acuity level and average response time. 2. Square localization: response error and response time is measured. 3. Motion detection: response error and response time is measured. 4. Table top task: locate and identify objects on a table. Accuracy rates and response times will be recorded. 5. Doorway detection task: to find doorway target. Task time and accuracy of door touch will be recorded. 6. Obstacle avoidance task: task time and number of collisions is recorded. 7. Functional Low Vision Observer Rated Assessment (FLORA): this assessment tool Is used to evaluate participant functional vision and mobility.

    Time frame: 2 years

  3. Quality of life - IVI - very low vision validated questionnaire

    Quality of life will be assessed via survey and self-report. The Functional Low Vision Observer Assessment (FLORA) is a questionnaire that will be used to measure participants changes in participant daily living experiences.

    Time frame: 2 years

07

Study locations

1 site
  • Centre for Eye Research Australia
    Melbourne, Victoria 3002, Australia
08

References and documents

Publications

  • Ayton LN, Blamey PJ, Guymer RH, Luu CD, Nayagam DA, Sinclair NC, Shivdasani MN, Yeoh J, McCombe MF, Briggs RJ, Opie NL, Villalobos J, Dimitrov PN, Varsamidis M, Petoe MA, McCarthy CD, Walker JG, Barnes N, Burkitt AN, Williams CE, Shepherd RK, Allen PJ; Bionic Vision Australia Research Consortium. First-in-human trial of a novel suprachoroidal retinal prosthesis. PLoS One. 2014 Dec 18;9(12):e115239. doi: 10.1371/journal.pone.0115239. eCollection 2014. PubMed 25521292 ↗
  • Abbott CJ, Baglin EK, Kolic M, McGuinness MB, Titchener SA, Young KA, Yeoh J, Luu CD, Ayton LN, Petoe MA, Allen PJ. Interobserver Agreement of Electrode to Retina Distance Measurements in a Second-Generation (44-Channel) Suprachoroidal Retinal Prosthesis. Transl Vis Sci Technol. 2022 Sep 1;11(9):4. doi: 10.1167/tvst.11.9.4. PubMed 36066322 ↗
  • Titchener SA, Nayagam DAX, Kvansakul J, Kolic M, Baglin EK, Abbott CJ, McGuinness MB, Ayton LN, Luu CD, Greenstein S, Kentler WG, Shivdasani MN, Allen PJ, Petoe MA. A Second-Generation (44-Channel) Suprachoroidal Retinal Prosthesis: Long-Term Observation of the Electrode-Tissue Interface. Transl Vis Sci Technol. 2022 Jun 1;11(6):12. doi: 10.1167/tvst.11.6.12. PubMed 35696133 ↗
  • Petoe MA, Titchener SA, Kolic M, Kentler WG, Abbott CJ, Nayagam DAX, Baglin EK, Kvansakul J, Barnes N, Walker JG, Epp SB, Young KA, Ayton LN, Luu CD, Allen PJ; Bionics Institute and Centre for Eye Research Australia Retinal Prosthesis Consortium. A Second-Generation (44-Channel) Suprachoroidal Retinal Prosthesis: Interim Clinical Trial Results. Transl Vis Sci Technol. 2021 Aug 12;10(10):12. doi: 10.1167/tvst.10.10.12. PubMed 34581770 ↗
  • Karapanos L, Abbott CJ, Ayton LN, Kolic M, McGuinness MB, Baglin EK, Titchener SA, Kvansakul J, Johnson D, Kentler WG, Barnes N, Nayagam DAX, Allen PJ, Petoe MA. Functional Vision in the Real-World Environment With a Second-Generation (44-Channel) Suprachoroidal Retinal Prosthesis. Transl Vis Sci Technol. 2021 Aug 12;10(10):7. doi: 10.1167/tvst.10.10.7. PubMed 34383875 ↗

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Feb 2018 to primary completion in Dec 2020, 34 months.

Of 30 interventional studies with no phase under Retinitis Pigmentosa, half reached primary completion within 42 months of starting (the median), counting those still running; a quarter within 21 and three quarters within 154. This study's 34 months is below that.

How these figures are worked out, and which studies are left out of them.

Registered
Dec 26, 2017
First posted
Jan 23, 2018
StartActual
Feb 13, 2018
Primary completionActual
Dec 18, 2020
CompletionActual
Dec 18, 2020
Last update
Aug 16, 2021
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Aug 16, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03406416
Lead sponsor
Mobius Medical Pty Ltd.
Collaborators
Bionic Vision Technologies, Center for Eye Research Australia, The Bionics Institute of Australia, University of Melbourne, Data 61 CSIRO, Australian National University
Responsible party
Sponsor
First posted
Jan 23, 2018
Start date
Feb 13, 2018
Primary completion
Dec 18, 2020
Completion
Dec 18, 2020
Last update
Aug 16, 2021

Study contacts

Penelope Allen, FRACO, FRACS
principal investigator · Center for Eye Research Australia

Oversight

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

Not currently enrolling

This study is completed, as verified in Aug 2021. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion