Eye implant showdown: which tiny drain works best for glaucoma?
NCT ID NCT07623434
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study compared two small eye implants, Hydrus and iStent, placed during cataract surgery to help lower eye pressure in people with open-angle glaucoma. 65 patients were followed long-term to see which device worked better and was safer. The goal was to reduce the need for glaucoma medications and protect vision.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Hydrus microimplant or iStent microimplant (both are tiny devices placed in the eye during cataract surgery to help drain fluid and lower eye pressure)
- What this could lead to
- If one device proves better, it could become the preferred option for managing glaucoma during cataract surgery, helping patients maintain vision with fewer eye drops.
- What could go wrong
- This is a small, completed study (65 people) comparing two existing devices, so it won't lead to a new treatment. Results may not apply to all glaucoma patients, and both devices carry surgical risks like infection or implant misplacement.
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
-
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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65 people
The number who actually took part.
- Started
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Jan 2015
- Finished
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May 2026
- 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: the cataract which had a significant effect on the visual acuity of the patients and one of the following conditions: progression of glaucoma in visual field confirmed by two consecutive examinations by the Humphrey visual field analyzer with SITA Standard 24-2 algorithm in the course of primary open-angle glaucoma despite the use of IOP-lowering medications (1 to 4 active ingredients) or patients not tolerating or adhering to the treatment. Exclusion Criteria: lack of consent for study participation, narrow-angle or closed-angle glaucoma, secondary glaucoma (including the course of psudoexfoliation syndrome, pigmentary glaucoma), advanced glaucoma, severe proliferative diabetic retinopathy, cloudy cornea, advanced macular degeneration, history of glaucoma surgical interventions (as well as trabeculoplasty), and use of more than four IOP-lowering medications
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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.
Contacts and locations
Locations
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Military Institute of Medicine - National Research Institute
Warsaw, Mazovian, 04-141, Poland
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can exercise shield the eyes of glaucoma patients?
- Can better Follow-Up schedules save sight in glaucoma?
- Portable devices could take the guesswork out of eye pressure checks
- Eye drops may shield the cornea after cataract surgery
- Can a puff of air replace the eye pressure probe?
- New eye scans may catch glaucoma before vision loss