Objective: To compare the efficacy of the temporal inverted ILM flap technique versus ILM peeling for better visual outcomes and closure of macular holes larger than 400 µm. Methodology: This was a non randomized controlled study conducted in the Department of Eye Unit 3, Institute of Ophthalmology, Mayo Hospital Lahore from January 2019 to December 2019. Twenty eyes with large macular holes were included; ten eyes were treated with the Temporal Inverted ILM Flap technique, and ten eyes were treated with ILM Peeling. Preoperatively all macular holes in both groups were assessed for visual acuity and size of macular hole on Optical Coherence Tomography (OCT). Postoperatively, one week, one month, three months, and six months, best corrected visual acuity (BCVA) was measured using the logarithm of the minimum angle of resolution (logMAR) scale and macular hole (MH) closure was assessed on OCT. The chi-square test was applied taking p-values < 0.05 a significant. Results: Initially, both groups had an average BCVAof 0.54 ± 0.1 logMAR. After 6 months, the group that underwent Temporal Inverted ILM Flap surgery showed a notable enhancement in BCVA(0.30 ± 0.08 logMAR) in comparison to the group that underwent ILM Peeling surgery (0.40 ± 0.08 logMAR, p = 0.012). There was a higher rate of Type 1 closure (90% compared to 60%, p = 0.011) and better continuity of the ellipsoid zone (100% compared to 80%, p = 0.12) in the group that utilized the temporal inverted flap method as compared to simple ILM peel. Conclusion: Temporal Inverted ILM Flap approach is more effective than ILM peeling in terms of better visual acuity, higher type 1 closure rate, and better continuity of the ellipsoid zone. Keywords: ILM Peeling, Macular Hole, Retinal Surgery, Temporal Inverted ILM Flap, Visual Acuity
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