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RecruitingNCT03713268MIOCTUpdated Oct 19, 2026

Intraoperative OCT Guidance of Intraocular Surgery II

An observational study in Macular Holes, Epiretinal Membrane and Diabetic Retinopathy, sponsored by Duke University. Recruiting at 1 site in United States. Open to participants aged 4 Weeks and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-10-19.

Sponsored by Duke University · Observational

From the registry’s dates

  • Started Sep 2018; still recruiting 8 years 1 month later.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
262
Ages
4 Weeks and older
Sex
All
01

Study summary

The overall five-year goals of the project are to develop novel technology to provide actionable new information through provision of live volumetric imaging during surgery, improving surgical practice and outcomes. The investigators believe this technology will enable novel ophthalmic and other microsurgeries not possible due to current limitations in surgical visualization.

02

Conditions studied

  • Macular Holes
  • Epiretinal Membrane
  • Diabetic Retinopathy
  • Retinal Detachment
  • Retinal Disease
  • Preretinal Fibrosis
  • Cataract
  • Ocular Tumor
  • Strabismus
  • Healthy

Keywords

  • Microscope Integrated optical coherence tomography
  • MIOCT
  • OCT Angiography
  • OCTA
03

In context

Retinal Perforations

139 studies on the registry are indexed under Retinal Perforations; 22 are open to participants now.

This study's planned enrollment of 262 is above the median of 50 across 43 observational studies indexed under Retinal Perforations.

Browse Retinal Perforations studies →

Lead sponsor

Duke University is the lead sponsor of 2,063 studies on the registry; 273 are open to participants now.

Of its 204 completed or terminated interventional studies of FDA-regulated products, 167 (82%) have results posted.

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

04

Who can participate

Ages eligible
4 Weeks and older
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Probability sample

Study population

262 subjects enrolled in 3 groups as follows:

  1. Healthy Controls: 50 subjects
  2. Surgeons as research subjects performing randomized testing in wet lab: 22 subjects
  3. Surgical patients as research subjects for application to ocular vitreoretinal and anterior segment surgery: 190 subjects

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

  1. Healthy controls: Healthy eyes without known disease: refractive error including myopia and non-significant cataract is allowed. For selected testing pseudophakia is allowed.
  2. Surgeons as research subjects: Adult (≥18 years old)
  3. Surgical patients (vitreoretinal surgery): Patients undergoing examination under anesthesia or surgery for vitreoretinal diseases
  4. Surgical patients (anterior segment surgery-glaucoma, ocular surface or strabismus requiring extraocular muscle surgery): Include both adults and children. Patient undergoing primary, elective minimally invasive glaucoma surgery, ocular surface surgery, or strabismus surgery.

Exclusion criteria

Exclusion Criteria:

  1. Healthy controls: Any ocular disease that restricts the ability to perform OCT scanning. Conflict of interest with investigators/study personnel, e.g. a student in the lab of an investigator.
  2. Surgeons as research subjects: no specific exclusion criteria.
  3. Surgical patients (vitreoretinal surgery): Neonates (\< 4 weeks of age) and patients with any ocular disease that restricts the ability to perform OCT scanning.
  4. Surgical patients (anterior segment surgery-corneal and cataract diseases): Pediatric patients: The cornea and cataract surgery studies will be restricted to adults (≥ 18 years). Children do not have cataract surgery typically by residents and therefore would not fit our study design. Similarly pediatric corneal transplants are very rare.
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
262 participants (estimated)
Patient registry
No

Groups and cohorts

  • Healthy (ocular health) participants

    Adult subjects with normal, ocular health will be enrolled to evaluate and obtain multiple images from the microscope integrated optical coherence tomography system for reproducibility testing in humans, provide feedback to engineers, and verify that the system functions to produce high quality images of the desired areas of the eye after ex vivo development before surgical use. Each healthy subject will be imaged by the MIOCT system. There will be no surgery or intervention on these healthy volunteer subjects. We anticipate that a portion of the volunteer subjects would have repeat imaging (e.g. for reproducibility testing).

    Device: Microscope integrated optical coherence tomography

  • Surgeons as research subjects

    Duke Eye Center surgical trainees (residents and fellows), attending surgeons, and surgeons from other medical institutions will be enrolled as subjects as we will test their performance with and without microscope integrated optical coherence tomography and with and without advances in 4D MIOCT in model surgeries in the research wet lab to better understand the utility of specific aspects and of this next generation MIOCT as a whole for specific anterior segment and retinal surgical tasks.

    Device: Microscope integrated optical coherence tomography

  • Surgical patients

    Adult and minor (\> 4 months of age) surgical patients will be enrolled to evaluate and obtain multiple images from the microscope integrated optical coherence tomography system during clinically indicated vitreoretinal and anterior segment surgical procedures.

    Device: Microscope integrated optical coherence tomography

Interventions

  • DeviceMicroscope integrated optical coherence tomography

    This is translational study in which subjects will either be imaged with a microscope integrated optical coherence tomography (MIOCT) system or they will use MIOCT during surgical procedures. OCT systems are optical imaging technology that allow non-contact imaging of the microanatomy of the retina, cornea, optic nerve head and retinal blood vessels. The MIOCT has been integrated into the surgical microscope used in retinal and anterior segment surgeries so it does not touch the eye. Unlike visible light from many examination devices, the infrared OCT beam is barely visible to the human eye as it sweeps across the retina. Thus the patient is not disturbed by the light.

    Also known as: MIOCT

06

What researchers measure

Primary outcomes

  1. Retinal and/or corneal microscope integrated optical coherence tomography image capture

    Ability to capture images

    Time frame: Year 1

  2. Quality of retinal and/or corneal microscope integrated optical coherence tomography image capture

    Quality of MIOCT images scored based on standard microanatomy and ability to detect presence or absence of ocular pathologies based on review by a masked grader.

    Time frame: Year 1

  3. Retinal vascular flow on optical coherence tomography angiography (OCTA) versus fluorescein angiography

    Cross correlation of ability to capture vessels and vessel pathology between OCTA and fluorescein angiographic images.

    Time frame: Year 1

  4. Assessment of change in pattern of ocular vascular flow before and after standard clinical surgical steps.

    Presence or absence of change in ocular morphology in pattern of vascular flow compared to prior to surgical steps

    Time frame: Year 1

  5. Assessment of change in ocular morphology before and after standard surgical steps

    Presence or absence of change in ocular morphology before and after standard surgical steps

    Time frame: Year 1

  6. Estimate of subretinal fluid volume before and after surgery for retinal detachment based on surgical view versus based on OCT output

    Volume estimates from surgeons analyzed relative to the postoperative calculated volume from the intraoperative MIOCT

    Time frame: Year 1

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

1 registry update 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

Started Sep 2018 (actual). Primary completion is estimated for Dec 2026, 99 months after the start.

Of 16 observational studies under Retinal Perforations, half reached primary completion within 26 months of starting (the median), counting those still running; a quarter within 7 and three quarters within 144. This study's planned 99 months is above that.

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

Registered
Oct 15, 2018
First posted
Oct 19, 2018
StartActual
Sep 30, 2018
Primary completionEst.
Dec 31, 2026
CompletionEst.
May 31, 2027
Last update
Oct 19, 2026
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.
Minor edits
Nothing that changes what the study is or who can join. Edited: verification date and contact details
1 update, last Oct 19, 2026
Show all 1 update
  1. Oct 19, 2026
    Minor edits only
    + 2 other changes: verification date and contact details

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT03713268
Lead sponsor
Duke University
Responsible party
Sponsor
First posted
Oct 19, 2018
Start date
Sep 30, 2018
Primary completion
Dec 31, 2026 (estimated)
Completion
May 31, 2027 (estimated)
Last update
Oct 19, 2026

Study contacts

Neeru Sarin, MBBS
Contact
neeru.sarin@duke.edu
919-668-5341
Michelle N McCall, MCAPM, BA
Contact
michelle.mccall@duke.edu
919-684-0554
Cynthia A Toth, MD
principal investigator · Duke University

Oversight

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

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