Poster Hee Seong Yoon

Purpose:

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

Methods:

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.

Results:

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).

Conclusions:

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.