Poster Hee Seong Yoon


To evaluate the relationship between the size of internal limiting membrane (ILM) peeling and elongation of foveal tissue after macular hole (MH) surgery.


The medical records of 64 patients (64 eyes) who developed elongation of foveal tissue on spectral domain optical coherence tomography (SD-OCT) after vitrectomy with ILM peeling and gas tamponade for idiopathic MH were retrospectively reviewed. In all eyes, elongation was identified on SD-OCT at 1, 3 and 6 month after surgery. These eyes were classified into 3 subgroups by the size of ILM peeling: Group 1 (12 eyes); smaller than 2 disc diameter (DD), Group 2 (40 eyes); 3 DD, and Group 3 (12 eyes); intervascular area. Inter-outer plexiform layer (OPL) distance representing elongation of foveal tissue was measured and compared among these three groups.


The mean follow-up period was 7.12 ±5.42 months. Over this follow-up period, inter-OPL distance was significantly increased in all groups. (p<0.01) Inter-OPL distance was not different at 1 month after surgery among the groups. However, it was significantly longer in eyes underwent smaller sized ILM peeling at 3 and 6 months after surgery: Group 1; 571.83 ±42.22 µm, Group 2; 541.17 ±43.1 µm, Group 3; 502.58 ±54.61 µm and Group 1; 590.91 ±94.34 µm, Group 2; 560.85 ±61.53 µm, 514.67 ±49.82 µm respectively (p<0.05).


Once elongation of the foveal tissue was identified after MH surgery, the length of asymmetric elongation was increased through 6 months after surgery. This increased length of elongation appears to be more prominent in smaller sized ILM peeling groups.