Kang Yeun Pak_SCIENTIFIC POSTER 2015

Purpose:

To investigate the topographic changes of the macula after closure of macular hole (MH) using vitrecotmy and the internal limiting membrane peeling.

Methods:

The custom program was used to compare the position of the retinal vessels in the macula between pre- and postoperation. Fundus photographs before and after MH surgery were selected for the following analysis, only if the same fundus camera was used for both photographs, and the disc was overlapped more than half of the area when two photographs were overlapped. The images were processed to enhance visualization of the vessels, and to match the location of the temporal vascular arcade. A grid of 16 sectors was superimposed on the processed image. The grid had two rings (1 to 2 mm, and 2 to 3 mm from the foveal center), and each ring was divided into 8 sectors; superior (S), superonasal (SN), nasal (N), inferonasal (IN), inferior (I), inferotemporal (IT), temporal (T), superotemporal (ST). En Face image of the 6×6 mm optical coherence tomography volume scan was registered to calculate the scale of the photograph. The transposition of the retinal vessels was measured a s a vector value by comparing the position of the bifurcation in each sector of the grid.

Results:

The analysis was performed in 21 eyes of 21 patients. The average distance of the displacement was 94.1 ± 37.7 μm in the inner ring, and 29.4 ± 10.3 μm in the outer ring. The average displacement was largest (145.2 μm) in the ST sector of the inner ring, and smallest (18.6 μm m) in I sector of the outer ring. The average displacement was to nasal side in all of 16 sectors. Inferior displacement was noted in the superior sectors, and superior displacement in the inferior sectors.

Conclusions:

The displacement of the retinal vessels of the macula after MH surgery was towards the horizontal raphe as well as the disc. The topographic changes represent centripetal displacement of the sensory retina to close the MH.

Contact Details:

Email: pky0402@naver.com
Cell Phone: +821028545228

Kang Yeun Pak