Laser before eye implant may prevent glaucoma damage
NCT ID NCT04232982
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether giving a laser treatment (transscleral cyclophotocoagulation) to lower eye pressure before a Boston keratoprosthesis (a plastic cornea implant) can prevent or slow glaucoma. Twenty adults who need the implant will receive one of two laser types 4-8 weeks before surgery and be followed for up to 5 years. The goal is to see if this approach reduces glaucoma progression and the need for additional treatments.
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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 20 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2020
- Expected to finish
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Dec 2036
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 to 80 years
- 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: * Adults patients * Able to give an informed consent * Capable of being followed during the study * Candidate for the Boston keratoprosthesis type I Exclusion Criteria: * Patients younger than 18 years old or older than 80 years old * Unable to give an informed consent * Participating to another interventional glaucoma study * Patients who received a glaucoma surgery or procedure (glaucoma drainage device or TS-CPC treatment) 3 months before their initial visit. * Unable to wear a therapeutic contact lens secondary to eyelid malformation * Severe Ocular surface Disease with keratinization * Intra-ocular tumor * Terminal Glaucoma * Phthisis bulbi * Ocular albinism
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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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Centre Hospitalier de l'Université de Montréal (CHUM)
RECRUITINGMontreal, Quebec, H2X 3E4, Canada
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