Submitted:
29 January 2026
Posted:
30 January 2026
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Abstract
Keywords:
1. Background
2. Patients and Methods
2.1. Study Design
2.2. Ethical Consideration
2.3. Patient Selection Criteria
2.3.1. Patients Inclusion criteria
- 18 years old or older Patient diagnosed with refractory DME, RVO edema, or active n-AMD by clinical evidence, optical coherence tomography OCT and angiography (OCTA).
- Primary refractory patients show persistent subretinal or intraretinal fluid with no improvement BCVA nor a decrease in central retinal thickness after a minimum of 3 loading doses of Bevacizumab and Aflibercept (CRT>300 µm with BCVA either unchanged or worse compared with baseline).
- Ability to attend follow-up appointments and comply with treatment protocol.
2.3.2. Patient Exclusion Criteria
- Inconsistent treatment history: missed a dose of anti-VEGF doses, or failure to complete the three loading doses of Faricimab.
- Ocular comorbidities that could confound outcomes, such as: Visually significant cataract as Grade 2+ or more, corneal opacity, uncontrolled glaucoma (IOP > 25 mmHg on medication) with an increase in cup/disc ratio, Other macular pathologies (e.g., macular hole, epiretinal membrane ERM).
- Severe baseline vision loss (BCVA < 6/60).
- 4. Secondary non-responders: patients who initially showed improvement in BCVA and CRT after anti-VEGF therapy, but subsequently experienced deterioration despite continued treatment with bevacizumab and aflibercept.
2.4. Methods
2.5. Statistical Analysis
3. Results
3.1. Demographic Data and Medical Background of Patients
3.2. Characteristic of the Eyes to be Treated
3.3. Ocular Diagnosis
3.4. Demographic Data and Medical Background of Patients with DME
3.5. Clinical Parameters for Patients with DME

| Parameters | Pretreatment | Posttreatment | P* value | ||
| Mean | SD | Mean | SD | ||
| Visual Acuity LogMAR | 0.60 | 0.24 | 0.44 | 0.24 | <0.001 |
| Intraocular Pressure | 15.64 | 2.20 | 15.57 | 2.54 | 0.673 |
| Central Retinal Thickness | 464.74 | 112.99 | 288.5 | 85.04 | <0.001 |
| Parameters | No.46 | 100% | No.46 | 100% | P^ value |
| Subretinal Fluid | 15 | 32.60% | 2 | 4.34% | <0.001 |
| Intraretinal Fluid | 46 | 100% | 19 | 41.30% | <0.001 |
3.6. Demographic Data and Medical Background of Patients with RVO
3.7. Clinical Parameters for Patients with RVO
| Parameters | Pretreatment | Posttreatment | P* value | ||
| Mean | SD | Mean | SD | ||
| Visual Acuity LogMAR | 0.71 | 0.25 | 0.48 | 0.27 | <0.001 |
| Intraocular Pressure | 17.65 | 2.13 | 17.5 | 1.88 | 0.408 |
| Central Retinal Thickness | 534.3 | 144.79 | 324.45 | 88.30 | <0.001 |
| Parameters | No.20 | 100% | No.20 | 100% | P^ value |
| Subretinal Fluid | 10 | 50% | 2 | 10% | 0.015 |
| Intraretinal Fluid | 20 | 100% | 9 | 45% | 0.002 |

3.8. Demographic Data and Medical Background of Patients with n-AMD
3.9. Clinical Parameters for Patients with n-AMD
| Parameters | Pretreatment | Posttreatment | P* value | ||
| Mean | SD | Mean | SD | ||
| Visual Acuity LogMAR | 0.63 | 0.18 | 0.39 | 0.28 | <0.001 |
| Intraocular Pressure | 14.64 | 2.44 | 14.91 | 2.83 | 0.216 |
| Central Retinal Thickness | 411.23 | 78.99 | 268.73 | 58.13 | <0.001 |
| Pigmented epithelial detachment | 176.91 | 225.71 | 68.91 | 100.94 | 0.007 |
| Parameters | No.22 | 100% | No.22 | 100% | P^ value |
| Subretinal Fluid | 22 | 100% | 3 | 13.63% | <0.001 |
| Intraretinal Fluid | 6 | 27.27% | 0 | 0% | <0.05 |

3.10. Retinal fluid
4. Discussion
4.1. Patient Demographics and Background
4.2. Best Corrected Visual Acuity
4.3. Anatomical Outcomes
5. Conclusions
Funding
Ethical Approval
Consent of Publication
Availability of Data and Materials
Acknowledgments
Conflicts of Interest
Abbreviations
| Ang2 | angiopoietin |
| BCVA | best corrected visual acuity |
| CRT | central retinal thickness |
| DME | diabetic macular edema |
| DM | diabetes mellitus |
| EDTR | Early treatment diabetic retinopathy study |
| HT | hypertension |
| IOP | intraocular pressure |
| IRF | intraretinal fluid |
| n-AMD | neovascular age related macular degeneration |
| OCTA | optical coherence tomography angiography |
| PED | pigmented epithelial detachment |
| PMH | past medical history |
| RVO | retinal vein occlusion edema |
| SD | standard deviation |
| SD-OCT | spectral domain optical coherence tomography |
| SRF | subretinal fluid |
| VA | visual acuity |
| VEGF | vascular endothelial growth factor |
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| Variables | No. (76) | 100% | |
|---|---|---|---|
| Mean age/years (mean±SD*) | 66.14±8.678 | ||
| Age ≥ 65 | 43 | 56.57% | |
| Age < 65 | 33 | 43.42% | |
| Gender | Male | 37 | 48.68% |
| Female | 39 | 51.32% | |
| Variables | No. (76) | 100% |
|---|---|---|
| PMH | 62 | 81.58% |
| HT | 30 | 39.47% |
| DM | 47 | 61.84% |
| Variables | No. (88) | 100% | |
|---|---|---|---|
| Laterality | Right | 44 | 50% |
| Left | 44 | 50% | |
| Intravitreal aflibercept | 45 | 51.14% | |
| Intravitreal bevacizumab | 32 | 36.36% | |
| Intravitreal aflibercept + Intravitreal bevacizumab | 11 | 12.50% | |
| Dose (mean±SD*) | 7 | 1.77 | |
| Variables | No. (38) | 100% |
|---|---|---|
| Mean age/years (mean±SD*) | 64.8±7.9 | |
| Age ≥ 65 | 17 | 44.7% |
| Age < 65 | 21 | 55.3% |
| PMH | 38 | 100% |
| DM | 38 | 100% |
| HT | 10 | 25.6% |
| Variables | No. (19) | 100% |
|---|---|---|
| Mean age/years (mean±SD*) | 63.6±8.6 | |
| Age ≥ 65 | 8 | 42.1% |
| Age < 65 | 11 | 57.9% |
| PMH | 14 | 73.7% |
| HT | 14 | 73.7% |
| DM | 3 | 15.9% |
| Variables | No. (19) | 100% |
|---|---|---|
| Mean age/years (mean±SD*) | 74.1±5.4 | |
| Age ≥ 65 | 18 | 94.7% |
| Age < 65 | 1 | 5.3% |
| PMH | 10 | 52.6% |
| HT | 7 | 36.8% |
| DM | 6 | 31.6% |
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