Eye fluid clues may unlock why wet AMD treatment fails for some
NCT ID NCT07249216
First seen Jun 27, 2026 · Last updated Sep 17, 2026 · Updated 3 times
Summary
This study aims to find out why 20-40% of people with wet age-related macular degeneration (AMD) don't respond well to standard anti-VEGF injections. Researchers will collect fluid from inside the eye of 117 patients and compare those who respond well to treatment with those who don't. By identifying other molecules involved, they hope to discover new ways to treat or predict poor response.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- ranibizumab
- What this could lead to
- If successful, this could point toward new treatments or biomarkers for wet AMD patients who don't respond well to current therapy.
- What could go wrong
- This is an early observational study with only 117 participants, so findings may not apply broadly or lead to immediate new treatments.
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 117 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jul 2025
- Expected to finish
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Jul 2029
An estimate. End dates often move.
- Lead sponsor
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A government agency
The lead sponsor is a government body.
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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50 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: 1. Patients aged ≥ 50 years old at the time of informed consent 2. Willing and able to provide informed consent 3. Willingness and ability to comply with all scheduled visits and study procedures 4. Female subjects must be of non-childbearing potential or show a negative pregnancy test at screening and must agree to use appropriate methods of contraception during the study and for one month after the last dose. 5. Confirmed diagnosis of symptomatic nAMD based on optical coherence tomography (OCT), fluorescein fundus angiography (FFA), and indocyanine green angiography (ICG-A) 6. nAMD characteristics: 1. Subfoveal CNV/PCV 2. Juxtafoveal/extrafoveal CNV/PCV with a subfoveal component related to the exudative activity. 7. Either: 1. Treatment naïve- NO previous treatment with intravitreal anti-VEGF agents, regardless of the indication, NO previous thermal laser in the macular region, or verteporfin photodynamic therapy (vPDT), regardless of indication. 2. Eyes that have received 3 prior monthly intravitreal ranibizumab injections within 3 months prior to enrolment for nAMD indication only; and no previous treatment with other intravitreal anti-VEGF agents, no previous thermal laser in the macular region, or verteporfin photodynamic therapy (vPDT), regardless of indication. 8. BCVA of 24-78 letters as measured by an Early Treatment Diabetic Retinopathy Study (ETDRS) chart (Snellen equivalent 20/32-20/320) Exclusion Criteria: 1. CNV or retinal exudation due to causes other than typical AMD, such as vitelliform dystrophy, ocular histoplasmosis, trauma, pathological myopia, angioid streaks, choroidal rupture, or uveitis 2. Active intraocular inflammation or suspected or active intraocular or periocular infection (eg, infectious conjunctivitis, keratitis, scleritis, endophthalmitis, infectious blepharitis) in either eye at Baseline 3. Any history or evidence of a concurrent intraocular condition in the study eye, including retinal diseases other than neovascular AMD, that, in the judgment of the Investigator, could either require medical or surgical intervention during the course of the study to prevent or treat visual loss that might result from that condition or that limits the potential to gain visual acuity upon treatment with the investigational product * History of cataract surgery within 6 months prior to recruitment * Cataract surgery during the study period is not permitted. 4. Retinal pigment epithelium (RPE) rip/tear in the study eye at Baseline 5. Current vitreous hemorrhage or history of vitreous hemorrhage in the study eye within 4 weeks prior to Baseline 6. History of rhegmatogenous retinal detachment, stage 3/4 macular hole, or any retinal break unless adequate repair has been performed 7. History of the following in the study eye: * Previous pars plana vitrectomy * Previous photodynamic therapy (PDT) * Intraocular or refractive surgery within the 6 months period prior to Baseline * Previous penetrating keratoplasty or vitrectomy * Previous pan retinal photocoagulation * Previous submacular surgery or macular laser treatment 8. Uncontrolled glaucoma or ocular hypertension in the study eye defined as intraocular pressure (IOP) \> 25 mmHg on medication or according to the investigator's judgment at baseline 9. Intra- or periocular use of corticosteroids in the study eye during the 6-month period prior to baseline: 1. Use of topical ocular corticosteroids in the study eye for 60 or more consecutive days within the 90-day period prior to baseline 2. Use of systemic corticosteroids for 30 or more consecutive days within the 90 days prior to baseline, with the exception of low stable doses of corticosteroids (defined as ≤10 mg prednisolone or equivalent dose used for 90 days or more). Inhaled, nasal or dermal steroids are also permitted 10. Previous therapeutic radiation near the region of the study eye 11. History of a medical condition (disease, metabolic dysfunction, physical examination finding, or clinical laboratory finding) that, in the judgment of the investigator, would preclude scheduled study visits, completion of the study, or a safe administration of the investigational product 12. History of hypersensitivity to any component of the test article or clinically relevant sensitivity to fluorescein dye (or indocyanine green), as assessed by the Investigator 13. Participation in an investigational drug, biologic, or device study within 30 days or the duration of 5 half-lives of the investigational product (whichever is longer) prior to baseline Note: observational clinical studies solely involving over-the-counter vitamins, supplements, or diets are not exclusionary 14. Systemic anti-vascular endothelial growth factor (VEGF) therapy within the 90-day period prior to baseline 15. Stroke or myocardial infarction in the 90-day period prior to baseline 16. Uncontrolled blood pressure defined as a systolic value ≥ 180 mmHg and/or diastolic value ≥ 100 mmHg at screening 17. Medical or psychiatric conditions that, in the opinion of the investigator, make consistent follow-up over the study period unlikely, or in general a poor medical risk because of other systemic diseases or active uncontrolled infections
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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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Singapore National Eye Centre/Singapore Eye Research Institute
RECRUITINGSingapore, Singapore
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can fewer eye injections dry the retina in wet AMD?
- The 20-Minute squeeze: how eye injections push pressure up
- Could years of eye injections weigh down the upper eyelid?
- One shot in the eye: gene therapy aims to replace repeated injections for wet AMD
- Can blocking rogue immune cells stop a leading cause of blindness?
- Can a One-Time gene injection ease the burden of wet AMD?