Material and Methods: Eyes with unilateral IMH diagnosis and no other retinal pathology (Group 1) were included in this prospective and controlled study. The control group (Group 2) was formed with the healthy fellow eyes of the patients. PPV operation, inverted internal limiting membrane (ILM) flap technique and intraocular sulfur hexafl uoride (SF6) gas implantation were applied to eyes with IMH. SFCT was measured by optical coherence tomography with the enhanced depth imaging method in all eyes during the 6-month follow-up period at the first, second, third and sixth months.

Results: Sixty-four eyes of 32 patients were included in the study. The mean age of the patients was 67.3 years. The success rate in closing the macular hole was 93.75%. In the preoperative period, the mean SFCT in Group 1 (211.8 ?m) was statistically significantly thinner than Group 2 (245.0 ?m) (p <0.012), and this difference became more pronounced after PPV in the 6-month postoperative follow-up period (p <0.000)

Conclusion: Choroidal thickness in eyes with IMH may be thinner than in healthy fellow eyes, and this thinness may deepen after macular surgery and gas endotamponade application. Keywords : Choroidal thickness, Macular hole, Vitrectomy, Sulfur hexafl uoride, Enhanced depth imaging