title: Macular slippage after macular hole surgery with internal limiting membrane peeling.
abstract: OBJECTIVE
  To describe macular slippage toward the optic disc after macular hole surgery with internal limiting membrane (ILM) peeling.
  
  
  METHODS
  A total of 27 eyes of 27 patients with idiopathic macular hole were included in this retrospective study. The fovea-to-disc distance (FDD) was measured from digital color fundus images before and at least six months after surgery. The position of the fovea was determined as the center of the macular hole before surgery and the center of the macular pigment area after surgery. The thickness of the nasal and temporal macula was measured using spectral-domain optical coherence tomography. The difference in thickness between the nasal and temporal macula was determined as the degree of parafoveal asymmetry (PFA).
  
  
  RESULTS
  The postoperative FDD was significantly shorter than the preoperative FDD: 4.00 ± 0.33 mm and 3.82 ± 0.34 mm, respectively (p < 0.0001). The mean decreased ratio of FDD was 4.68% (range, 0.38-9.24%). The appearance of the dissociated optic nerve fiber layer (DONFL) was finally found in 21 eyes (78%). The decreased FDD ratio was significantly larger in eyes with the DONFL appearance than in those without it: 5.61 ± 1.74% and 1.44 ± 1.12%, respectively (p < 0.0001). The decreased ratio of FDD was correlated with the postoperative PFA (r = 0.63, p = 0.0004).
  
  
  CONCLUSIONS
  A macula in which the ILM has peeled off would slip toward the optic disc after macular hole surgery. Macular slippage can be a reasonable cause for the macular alterations such as an appearance of DONFL and changes in asymmetrical parafoveal thickness.
authors.affiliation: Department of Ophthalmology, Faculty of Medicine, University of Yamanashi , Japan.
authors.forename: Tomomi
authors.initials: T
authors.lastname: Nakagomi
authors.forename: Teruhiko
authors.initials: T
authors.lastname: Goto
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Tateno
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Oshiro
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Iijima
mesh_terms: D000368:Aged; D001485:Basement Membrane / Q000473:pathology; D019773:Epiretinal Membrane / Q000473:pathology* / Q000601:surgery*; D005260:Female; D005584:Fovea Centralis / Q000473:pathology / Q000601:surgery; D006801:Humans; D008297:Male; D009898:Optic Disk / Q000473:pathology / Q000601:surgery; D011183:Postoperative Complications / Q000473:pathology*; D012167:Retinal Perforations / Q000473:pathology* / Q000601:surgery*; D012189:Retrospective Studies; D041623:Tomography, Optical Coherence; D014792:Visual Acuity; D014821:Vitrectomy / Q000009:adverse effects* / Q000379:methods