Abstract
Background
A significant proportion of eyes with polypoidal choroidal vasculopathy (PCV) can be resistant to anti-vascular endothelial growth factor (VEGF) injections. We evaluated the efficacy of a combination of dexamethasone intravitreal implant (DXI) and anti-VEGF therapy in eyes resistant to anti-VEGF monotherapy.
Methods
In this retrospective study, patients with PCV resistant to anti-VEGF injections were additionally injected with a DXI along with an anti-VEGF agent. Best-corrected visual acuity (BCVA), slit-lamp examination, fundus evaluation, and optical coherence tomography (OCT) data were analyzed. Anatomical response on OCT was the primary outcome measure. Change in visual acuity and injection-free interval after DXI were evaluated as secondary outcome measures.
Results
Twelve eyes of 11 patients were included in the study. Mean age of patients at presentation was 64.7 ± 9.5 years (range, 49–78.8 years), and there were seven females (63.6%). Median number of anti-VEGF injections prior to DXI was 4 (interquartile range IQR, 3–7). Median follow-up duration after DXI was 32.2 months (IQR, 6.6–41.6 months). Median logMAR BCVA immediately prior to DXI was 0.41 (IQR, 0.30–0.88) and after injection was 0.40 (IQR, 0.30–1.05), which was not significantly different (p = 0.85). Median Central Retinal Thickness (CRT) after DXI was 305.5 µm (IQR, 249–409 µm), which was significantly (p = 0.003) lesser than pre-injection thickness of 547 µm (IQR, 431–771 µm). Median injection-free interval in these eyes after DXI was 5 months (IQR, 2.8–6.4 months). Kaplan–Meier estimates of first injection after DXI were 27.3% at 3 months, 67.3% at 6 months, and 89.1% at 12 months.
Conclusions
Dexamethasone implant combined with anti-VEGF treatment can prolong the treatment-free interval in eyes with PCV resistant to anti-VEGF injection while maintaining visual acuity.
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Abbreviations
- BCVA:
-
Best-corrected visual acuity
- CNVM:
-
Choroidal neovascular membrane
- CRT:
-
Central retinal thickness
- DXI:
-
Dexamethasone implant
- FFA:
-
Fundus fluorescein angiography
- ICGA:
-
Indocyanine green angiography
- IOP:
-
Intraocular pressure
- IQR:
-
Inter-quartile range
- ME:
-
Macular edema
- nAMD:
-
Neovascular age-related macular degeneration
- PCV:
-
Polypoidal choroidal vasculopathy
- PED:
-
Pigment epithelial detachment
- OCT:
-
Optical coherence tomography
- VEGF:
-
Vascular endothelial growth factor
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Acknowledgements
Hyderabad Eye Research Foundation and India Alliance DB Wellcome Trust.
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RN, KM, and AM contributed to data collection, analysis and interpretation, preparation of the manuscript, and provided major revisions to the manuscript. RR, MPS, RSA, and SKP contributed to interpretation and final analysis of manuscript. AM and KM performed statistical analysis. All authors participated in the development and writing of the manuscript and approved the final article for publication.
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The datasets used and/or analyzed during the current study are available from the corresponding author on request.
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The study protocol adhered to the tenets of the Declaration of Helsinki and was approved by the local Institutional Review Board (LEC 05–18-089) at L.V. Prasad Eye Institute. All study participants gave a written informed consent before enrollment. Patients were recruited from March 2017 through November 2019.
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Mallikarjun, K., Narayanan, R., Raman, R. et al. Dexamethasone implant improves anatomic response to anti-VEGF therapy in treatment-resistant polypoidal choroidal vasculopathy. Int Ophthalmol 42, 1263–1272 (2022). https://doi.org/10.1007/s10792-021-02113-4
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DOI: https://doi.org/10.1007/s10792-021-02113-4