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Your journey
1What's a trial
4Get in touch
More info
You can access this
clinical trial
if you have
Diabetic Retinopathy or Diabetic Macular Edema
and you are
over 18
years old
This is a trial in the final phase before the treatment is released on the market.
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The purpose

Multiple studies have implicated vascular endothelial growth factor VEGF as a major causative factor in human eye diseases characterized by neovascularization including proliferative diabetic retinopathy (PDR) and vascular permeability including diabetic macular edema (DME). While there is strong evidence that PDR outcomes are markedly reduced in eyes that are treated with monthly anti-VEGF therapy (A Study of Ranibizumab Injection in Subjects With Clinically Significant Macular Edema (ME) With Center Involvement Secondary to Diabetes Mellitus: RIDE/RISE) and moderately reduced in eyes that received fairly frequent dosing during the 1st year of treatment (Diabetic Retinopathy Clinical Research Network protocol I), it is unknown whether or not an earlier but less frequent dosing regimen would result in similar, favorable anatomic outcomes, and whether favorable anatomic outcomes subsequently would result in favorable visual acuity outcomes. If this study demonstrates that intravitreous aflibercept treatment is effective and safe for reducing the onset of PDR or center involved- DME (CI-DME) in eyes that are at high risk for these complications, a new strategy to prevent vision threatening complications of diabetes will be available for patients. The application of intravitreous aflibercept earlier in the course of disease (i.e., at the time when an eye has baseline severe non-proliferative diabetic retinopathy) could help to reduce future potential treatment burden in patients, at the same time resulting in similar or better long-term visual outcomes, if PDR and DME are prevented. The primary objectives of this protocol are to 1) determine the efficacy and safety of intravitreous aflibercept injections versus sham injections (observation) for prevention of PDR or CI-DME in eyes at high risk for development of these complications and 2) compare long-term visual outcomes in eyes that receive anti-VEGF therapy early in the course of disease with those that are observed initially, and treated only if high-risk PDR or CI-DME with vision loss develops. Secondary objectives include: - Comparing other visual acuity outcomes between treatment groups, such as proportion of eyes with at least 10 or at least 15 letter loss from baseline, or gain or loss of at least 5 letters at the consecutive study visit just before and at the 2- or 4-year visit - Comparing optical coherence tomography (OCT) outcomes, such as mean change in OCT central subfield thickness and volume from baseline - Comparing proportion of eyes with at least 2 and 3-step worsening or improvement of diabetic retinopathy severity level (scale for individual eyes) by central reading center from baseline - Comparing associated treatment and follow-up exam costs between treatment groups - Comparing safety outcomes between treatment groups

Provided treatments

  • Procedure: Prompt Sham
  • Drug: Prompt aflibercept
  • Procedure: Deferred laser
  • Drug: Deferred aflibercept

Locations near you

Unfortunately, there are no recruiting locations near you. Please check the list with all locations below.
Tris trial is registered with FDA with number: NCT02634333. The sponsor of the trial is Jaeb Center for Health Research and it is looking for 328 volunteers for the current phase.
Official trial title:
Intravitreous Anti-Vascular Endothelial Growth Factor Treatment for Prevention of Vision Threatening Diabetic Retinopathy in Eyes at High Risk