Abstract
Purpose
To describe a multi-layered inverted internal limiting membrane (ILM) flap technique and to evaluate the surgical out-comes of this surgery in patients with macular holes > 800 μ m in base diameter.
Methods
The medical records of patients who received a multi-layered ILM flap technique were retrospectively studied and patients with macular holes > 800 μ m were included in the analyses. Best-corrected visual acuity (BCVA) before and after surgery, preoperative hole size, hole base size, vertical size, and hole closure after surgery were checked using spectral domain optical coherence tomography. Pars plana vitrectomy was performed and the ILM was stained using indocyanine green and peeled with the base attached at the hole margin. The ILM flap was inverted over the macular hole with 2∼3 layers, and gas injection was performed.
Results
The mean age of 12 patients was 65.2 ± 12.3 years. The mean BCVA (logMAR) was 1.27 ± 0.61. The mean hole size was 563.6 ± 221.9 μ m, the mean vertical size was 418.8 ± 80.9 μ m, and the mean hole base size was 1,182.8 ± 298.5 μ m. The mean follow-up period was 174.4 ± 143.3 days. Nine macular holes were closed after surgery but three macular holes were not closed. The postoperative mean BCVA (logMAR) was 0.21 ± 0.51. Eight eyes showed visual improvement while three eyes did not show visual improvement after macular hole surgery.
Go to : 

References
1. La Cour M, Friis J. Macular holes: classification, epidemiology, natural history and treatment. Acta Ophthalmol Scand. 2002; 80:579–87.


2. Johnson RN, Gass JD. Idiopathic macular holes. Observations, stages of formation, and implications for surgical intervention. Ophthalmology. 1988; 95:917–24.
3. Yooh HS, Brooks HL Jr, Capone A Jr, et al. Ultrastructural features of tissue removed during idiopathic macular hole surgery. Am J Ophthalmol. 1996; 122:67–75.
4. Tatham A, Banerjee S. Face-down posturing after macular hole surgery: a meta-analysis. Br J Ophthalmol. 2010; 94:626–31.


5. Konstantinidis A, Hero M, Nanos P, Panos GD. Efficacy of abdominal platelets in macular hole surgery. Clin Ophthalmol. 2013; 7:745–50.
6. Michalewska Z, Michalewski J, Adelman RA, Nawrocki J. Inverted internal limiting membrane flap technique for large abdominal holes. Ophthalmology. 2010; 117:2018–25.
7. Kuriyama S, Hayashi H, Jingami Y, et al. Efficacy of inverted abdominal limiting membrane flap technique for the treatment of macular hole in high myopia. Am J Ophthalmol. 2013; 156:125–31.e1.
8. Michalewska Z, Michalewski J, Dulczewska-Cichecka K, Nawrocki J. Inverted internal limiting membrane flap technique for surgical repair of myopic macular holes. Retina. 2014; 34:664–9.


9. Shin MK, Park KH, Park SW, et al. Perfluoro-n-octane-assisted single-layered inverted internal limiting membrane flap technique for macular hole surgery. Retina. 2014; 34:1905–10.


10. Khodani M, Bansal P, Narayanan R, Chhablani J. Inverted internal limiting membrane flap technique for very large macular hole. Int J Ophthalmol. 2016; 9:1230–2.


11. Kang SW, Ahn K, Ham DI. Types of macular hole closure and their clinical implications. Br J Ophthalmol. 2003; 87:1015–9.


12. Shukla SY, Afshar AR, Kiernan DF, Hariprasad SM. Outcomes of chronic macular hole surgical repair. Indian J Ophthalmol. 2014; 62:795–8.


13. Tognetto D, Grandin R, Sanguinetti G, et al. Internal limiting abdominal removal during macular hole surgery: results of a multicenter retrospective study. Ophthalmology. 2006; 113:1401–10.
14. Haritoglou C, Reiniger IW, Schaumberger M, et al. Five-year fol-low-up of macular hole surgery with peeling of the internal abdominal membrane: update of a prospective study. Retina. 2006; 26:618–22.
15. Freeman WR, Azen SP, Kim JW, et al. Vitrectomy for the treatment of full-thickness stage 3 or 4 macular holes. Results of a abdominaled randomized clinical trial. The Vitrectomy for Treatment of Macular Hole Study Group. Arch Ophthalmol. 1997; 115:11–21.
16. Morizane Y, Shiraga F, Kimura S, et al. Autologous transplantation of the internal limiting membrane for refractory macular holes. AmJ Ophthalmol. 2014; 157:861–9.e1.


17. Aurora A, Seth A, Sanduja N. Cabbage leaf inverted flap ILM abdominal for macular hole: a novel technique. Ophthalmic Surg Lasers Imaging Retina. 2017; 48:830–2.
18. Ip MS, Baker BJ, Duker JS, et al. Anatomical outcomes of surgery for idiopathic macular hole as determined by optical coherence tomography. Arch Ophthalmol. 2002; 120:29–35.


19. Wakely L, Rahman R, Stephenson J. A comparison of several methods of macular hole measurement using optical coherence abdominal, and their value in predicting anatomical and visual outcomes. Br J Ophthalmol. 2012; 96:1003–7.
20. Michalewska Z, Michalewski J, Cisiecki S, et al. Correlation abdominal foveal structure and visual outcome following macular hole surgery: a spectral optical coherence tomography study. Graefes Arch Clin Exp Ophthalmol. 2008; 246:823–30.
21. Leonard RE 2nd, Smiddy WE, Flynn HW Jr, Feuer W. abdominal visual outcomes in patients with successful macular hole surgery. Ophthalmology. 1997; 104:1648–52.
22. Kumagai K, Ogino N, Demizu S, et al. Variables that influence abdominal acuity after macular hole surgery. Jpn J Ophthalmol. 2001; 45:112.
23. Ullrich S, Haritoglou C, Gass C, et al. Macular hole size as a abdominal factor in macular hole surgery. Br J Ophthalmol. 2002; 86:390–3.
24. Mahalingam P, Sambhav K. Surgical outcomes of inverted internal limiting membrane flap technique for large macular hole. Indian J Ophthalmol. 2013; 61:601–3.


25. Lee JJ, Lee IH, Park KH, et al. Vascular displacement in idiopathic macular hole after single-layered inverted internal limiting abdominal flap surgery. Korean J Ophthalmol. 2017; 31:336–42.
Go to : 

![]() | Figure 1.Parameter of macular hole on optical coherence tomography. The macular hole diameters measured at the level of retinal pigment epithelium (BD), at the minimum extent of the hole (HD). The height of the hole (HT) was also measured. HT = height; HD = hole diameter; BD = base diameter. |
![]() | Figure 2.Schematic drawing showing multi-layered inverted internal limiting membrane (ILM) flap technique. (A) After performing a 23-gauge 3-port pars plana vitrectomy. (B) Indocyanine green (0.1% solution) is applied around the macular hole (MH). (C) The ILM is peeled off in a circular fashion around the MH. The ILM is not removed completely but left attached to the edge of the MH. (D) The ILM flap is flipped by inverting it using the intraocular forceps to cover the whole MH layer upon layer and gently massaged to make it flattened. Supplementary perfluorocarbon liquids is applied on top of the multi-layered inverted ILM flap as ballast before air-fluid exchange is performed. |
![]() | Figure 3.A case of full thickness macular hole in 70-year-old-female. Preoperative color fundus photography (A) and optical coherence tomography (OCT) (B) of the left eye demonstrated large macular hole (hole base: 1,436 μ m). 6 days after surgery, type 1 closure of hole was detected in OCT scan image (C). There was no change in logMAR vision from 1.10 to 1.10. |
![]() | Figure 4.A case of full thickness macular hole in 75-year-old-female. Preoperative color fundus photography (A) and optical coherence tomography (OCT) (B) of the left eye demonstrated large macular hole (hole base: 1,304 μ m). 7 days after surgery, type 1 closure of hole was detected in OCT scan image (C). logMAR vision improved from 1.60 to 1.00. |
![]() | Figure 5.A case of full thickness macular hole in 38-year-old-male. Preoperative color fundus photography (A) and optical coherence tomography (OCT) (B) of the left eye demonstrated large macular hole (hole base: 1,387 μ m). 13 days after surgery, type 1 closure of hole was detected in OCT scan image (C). logMAR vision improved from 1.20 to 0.70. |
![]() | Figure 6.A case of full thickness macular hole in 67-year-old-male. Preoperative color fundus photography (A) and optical coherence tomography (OCT) (B) of the right eye demonstrated large macular hole (hole base: 962 μ m). 2 months after surgery, type 1 closure of hole was detected in OCT scan image (C). logMAR vision improved from 0.80 to 0.70. |
![]() | Figure 7.A case of full thickness macular hole in 70-year-old-female. Preoperative color fundus photography (A) and optical coherence tomography (OCT) (B) of the right eye demonstrated large macular hole (hole base: 1,071 μ m). 14 days after surgery, type 1 closure of hole was detected in OCT scan image (C). logMAR vision improved from 0.80 to 0.70. |
Table 1.
Characteristics of patients
Table 2.
Result of multi-layered inverted inverted internal limiting membrane flap technique
Case number | Follow up (days) | Baseline visual acuity (logMAR) | Postoperative visual acuity (logMAR) | Type of closure |
---|---|---|---|---|
1 | 423 | 1.10 | 1.10 | Type 1 closure* |
2 | 448 | 1.00 | 0.30 | Type 1 closure |
3 | 228 | 1.00 | 0.10 | Type 1 closure |
4 | 63 | 3.00 | 1.10 | Non-closure |
5 | 210 | 1.00 | 0.50 | Type 2 closure† |
6 | 67 | 1.60 | 1.00 | Type 1 closure |
7 | 115 | 1.00 | 1.00 | Type 1 closure |
8 | 58 | 1.20 | 0.70 | Type 1 closure |
9 | 73 | 0.80 | 0.70 | Type 1 closure |
10 | 59 | 1.00 | 1.30 | Non-closure |
11 | 122 | 0.80 | 0.80 | Non-closure |
12 | 123 | 1.00 | 1.00 | Type 1 closure |
Table 3.
Result of the relation between hole size and hole closure
Result | N |
Base diameter (μ m) |
Hole diameter (μ m) |
||
---|---|---|---|---|---|
Mean | Standard deviation | Mean | Standard deviation | ||
Closure | 9 | 1084.1 | 237.5 | 538.3 | 68.9 |
Non-closure | 3 | 1479.0 | 298.4 | 640.0 | 165.2 |
Between 2 group comparision p-value* | 0.052 | 0.518 |
Table 4.
Result of the relation between hole closure and visual acuity improvement
Result |
Visual acuity improvement |
Total | |
---|---|---|---|
Improve | No improve | ||
Closure | 7 | 2 | 9 |
Non-closure | 1 | 2 | 3 |
p-value* | 0.88 | 12 |