Aims To evaluate long-term reconstructive changes in foveal microstructures and their associations with visual improvement in eyes with surgically closed macular holes (MHs).
Methods Twenty-eight eyes of 28 patients who underwent successful idiopathic MH repair were retrospectively studied. Best-corrected visual acuity (BCVA) and spectral-domain optical coherence tomography images were examined preoperatively and 1, 3, 6, 12, 24 and 36 months postoperatively. Correlations between postoperative BCVA and parameters relating to the reconstruction of the foveal photoreceptor layer including the external limiting membrane (ELM), ellipsoid zone (EZ) and cone interdigitation zone (CIZ) as well as changes in glial cells were evaluated.
Results Logarithm of the minimum angle of resolution BCVA improved continuously during 3-year follow-up (baseline 0.70±0.27, 1 month 0.36±0.34, 3 months 0.29±0.30, 6 months 0.22±0.24, 12 months 0.18±0.25, 24 months 0.14±0.22, 36 months 0.10±0.19) (p=0.015). Continuous reconstruction of the foveal microstructure was apparent throughout the 3-year follow-up. The reconstruction process was initiated by glial proliferation, followed by ELM bridging, glial elimination with EZ reconstruction and CIZ reconstruction. Better BCVA at the 3-year time-point was significantly associated with early ELM bridging, early glial disappearance and photoreceptor integrity defined as complete reconstruction of the ELM, EZ and CIZ.
Conclusions Integrity of the photoreceptor layer was correlated with better long-term visual outcomes after MH repair. Reconstruction of the foveal ELM and disappearance of glial proliferation in the early postoperative period predicted better visual recovery.
- macular hole
- external limiting membrane (ELM)
- ellipsoid zone (EZ)
- cone interdigitation zone (CIZ)
- glial cells
- visual recovery
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Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Ethics approval The study adhered to the tenets of the Declaration of Helsinki and was approved by the institutional review board committee of Osaka University Medical School.
Provenance and peer review Not commissioned; externally peer reviewed.
Patient consent Obtained.
Contributors Study design, data acquisition and statistical analysis: MK and TW; interpretation of data: MK, TW, KeN, HS; writing (original draft): MK; writing (review and editing): TW, KeN, HS, KoN; final approval of manuscript: all authors; supervision: HS and KoN.
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