Abstract
Purpose
To describe the structural changes observed postoperatively in epiretinal membranes (ERM), in particular the alterations in the central cone bouquet (CB), and to identify prognostic factors that might predict postoperative outcome.
Methods
We included 125 eyes of 117 patients who underwent idiopathic ERM removal with at least a 6-month follow-up. For each patient, spectral-domain optical coherence tomography (SD-OCT) was performed and best-corrected visual acuity (BCVA) was measured, before and after surgery.
Results
Before surgery, 44 eyes (35.2%) presented CB alterations: 65.9% a cotton ball sign, 15.9% a foveolar detachment and 18.2% a pseudovitelliform lesion. Median BCVA increased from 20/63 to 20/32 post-operatively (p = .001) with a mean follow-up of 17 months. The disappearance of CB alterations after surgery was observed in 97.7% of eyes. In stage 3 and 4 ERM, ectopic inner foveal layers persisted in 76.7% of eyes after surgery. Postoperative BCVA was correlated with change in central macular thickness and initial BCVA and was not correlated with the presence of preoperative CB alteration, the initial stage of ERM, the presence of postoperative dissociated optical nerve fiber layer, and the disappearance of ectopic inner fiber layers. The combination of cataract surgery and capsulotomy did not seem to change visual outcome and seemed to accelerate visual recovery. Incidentally, general anesthesia was correlated with final BCVA.
Conclusion
ERM surgery allowed a significant gain in BCVA and the disappearance of CB alterations in the great majority of cases. CB alteration did not show to be associated with poor visual prognosis.
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Data availability
The data that support the findings of this study are available from the corresponding author, upon reasonable request.
Abbreviations
- BCVA:
-
best corrected visual acuity
- CB:
-
central cone bouquet
- CRT:
-
central retinal thickness
- DONFL:
-
dissociated optic nerve fiber layer appearance
- EIFL:
-
ectopic inner foveal layer
- ERM:
-
epiretinal membrane
- ILM:
-
internal limiting membrane
- logMAR:
-
logarithm of the minimal angle of resolution
- OCT:
-
optical coherence tomography
- PPV:
-
pars plana vitrectomy
- PVD:
-
posterior vitreous detachment
- TLH:
-
tractional lamellar hole
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Acknowledgments
The authors would like to thank the following colleagues for their contributions: Drs Auzemery, Beladina, Destouches, Diedler, Jacquelin, Rivoal, Lim, Marcel, Mattar, Misgault, Nedey, Sabouret, Villiermet, and Voigt. They provided and cared for study patients.
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The design of this retrospective, observational series was approved by the Institutional Review Board of Creteil University. All patients provided written informed consent for participation in the study. The described research methods and analysis adhered to the tenets of the 1964 declaration of Helsinki.
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Fig4
Supplemental figure: Dissociated optic nerve fiber layer (DONFL) aspect in “En-face” blue reflectance. Four years after ERM surgery, the “En-face” blue reflectance picture shows several hyporeflective dots corresponding to the rearrangement of the retinal nerve fibers layer. Postoperative BCVA was 20/20. (PNG 1540 kb)
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Ortoli, M., Blanco-Garavito, R., Blautain, B. et al. Prognostic factors of idiopathic epiretinal membrane surgery and evolution of alterations of the central cone bouquet. Graefes Arch Clin Exp Ophthalmol 259, 2139–2147 (2021). https://doi.org/10.1007/s00417-021-05110-6
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DOI: https://doi.org/10.1007/s00417-021-05110-6