Plastic implants in the eye could delay corneal transplants for keratoconus patients
NCT ID NCT02138669
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times
Summary
This study tests INTACS prescription inserts, small plastic implants placed in the cornea, to reduce astigmatism and improve vision in people with keratoconus. The goal is to help patients who can no longer see well with glasses or contacts and may otherwise need a corneal transplant. Researchers will measure changes in vision, astigmatism, and corneal shape in 25 adults over time.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- INTACS prescription inserts (plastic corneal implants)
- What this could lead to
- If successful, this device could help people with keratoconus see better without glasses or contacts and delay or avoid the need for a corneal transplant.
- What could go wrong
- This is a small study (25 people) with no comparison group, so results may not apply to everyone. The device is already approved for humanitarian use, but benefits may vary and risks like infection or implant issues exist.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 25 people
The number the study aims to enrol. It can still change while the study runs.
- Start date
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Jan 2011
- Expected to finish
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Jul 2030
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: Who have experienced a progressive deterioration in their vision, such thot they can no longer achieve adequate functional vision on a daily basis with their contact lenses or spectacles; Who are 21 years of age or older; Who have clear central corneas; Who have a corneal thickness of 450 microns or greater at the proposed incision site; Who have corneal transplantation as the only remaining option to improve their functional vision. Exclusion Criteria: Who have abnormally thin corneas or who have a corneal thickness of 449 microns or less at the proposed incision site; Patients with collagen vascular, autoimmune or immunodeficiency disease; Pregnant or nursing patients; Presence of ocular conditions, such as recurrent corneal erosion syndrome or corneal dystrophy, that my predispose the patient to future complications; Patients who are taking on or more of following medications: isotretinoin (Accutane); amiodarone HCL (Cordarone).
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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UTSW Medical Center at Dallas
RECRUITINGDallas, Texas, 75390, United States
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