NCT05414994 · Vanderbilt University Medical Center
Assessment of the Ocular Microbiome in Health and Disease
What this study is about
The objective of this application is to illustrate the core constituents of the ocular surface microbiome, describe factors that promote colonization, and assess the ocular microbiome's role in the health of the anterior segment. We will conduct a forward-looking, observational group of participants study, including a longitudinal analysis of the ocular microbiome in adults.
View original scientific description
The objective of this application is to illustrate the core constituents of the ocular surface microbiome, describe factors that promote colonization, and assess the ocular microbiome's role in the health of the anterior segment. We will conduct a prospective, observational cohort study, including a longitudinal analysis of the ocular microbiome in adults.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- We will include subjects who meet all of the following criteria:
- 18 years of age or older
- Provide informed consent
- Cohort A - normal eyes with no ocular disease
- Cohort B - primary open angle glaucoma/Ocular hypertension defined as mild glaucoma which is well controlled with no more than one drop of prostaglandin use daily for the past 6 months
- Cohort C - non-infectious keratopathy not using any prescription medication (OTC artificial tears are acceptable)
- Cohort D - Dry AMD (age related macular degeneration)
- Cohort E - Wet AMD
- Cohort F - diabetic retinopathy
Exclusion criteria
- We will exclude subjects who meet all of the following criteria:
- Prior ocular disease either of the anterior or posterior segment
- Any medical comorbidities except well controlled DH and HTN
- Unable to follow up with study procedures as described
Where
- Nashville, Tennessee
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jan 22, 2026 · Source of record for eligibility and locations