Optical Coherence Tomography Comparative Study
Public ClinicalTrials.gov record NCT00069199. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This study, conducted at the NIH Clinical Center and the University of Wisconsin University, will compare measurements obtained using older and newer models of a machine called an optical coherence tomography (OCT) scanner. This instrument uses a beam of light to measure the thickness of the retina, the light-sensitive inner lining of the back of the eye. OCT measurements will be done in multicenter clinical trials of new treatments for disorders that cause vision loss, such as macular edema. Because some centers in these studies will use the older OCT model and some the newer one, it is necessary to determine whether the two models give comparable results. People 18 years of age and older in the following categories may be eligible for this study: * People with diabetes, with or without macular edema; * People with other retinal disease, such as uveitis or vein occlusion in the retina; * People with no history of eye disease who have a normal retina. Participants will have the following tests and procedures: * Eye examination to assess vision and eye pressure and to evaluate the retina. The pupils are dilated with drops for this examination. * Stereoscopic color fundus photography to examine the back of the eye. Eye drops are used to enlarge the size of the pupils to allow for a through examination and photographs of the eye using a special camera that flashes a bright light into the eye. * OCT to measure retinal thickness. For this procedure, the subject sits in front of a small screen and looks at a target in the center of the screen while a dim red light moves across the subject's retina. This test is done first with one model of the OCT scanner, then the other. Finally, the test is repeated in both eyes with whichever model was used first. Patients who are being treated for macular edema will repeat the same tests at their 3-month visits.
Study identification
- NCT ID
- NCT00069199
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 120 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- Not listed
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Aug 31, 2003
- Primary completion
- Not listed
- Completion
- Jul 31, 2005
- Last update posted
- Mar 3, 2008
2003 – 2005
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| National Eye Institute (NEI) | Bethesda | Maryland | 20892 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00069199, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Mar 3, 2008 · Synced Sep 9, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00069199 live on ClinicalTrials.gov.