Differences in the outer plexiform layer (OPL) in repeated OCT measurements.

Abstract

<p>(A) and (B) show two repeated OCT measurements (16 min between both examinations) of the same subject with the same scan settings (Scan V-25-1024 in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0137316#pone.0137316.g001" target="_blank">Fig 1</a>). On the left, the fundus images are given with an overlay of the OPL thickness maps generated by the Eye Explorer software (Heidelberg Engineering, Germany). The B-scans (with and without OPL segmentation lines) are shown on the right and are located at the position indicated by the green line on the fundus images. (C) The difference map on the left was calculated by subtracting the OPL thickness map in (A) from the map in (B) (custom Matlab program). The values in the grid are the mean OPL thickness differences for each sector. The right graph maps the OPL thickness of the B-scans in (A) (green line) and (B) (blue line), respectively. The red line indicates the difference between the repeated B-scans.</p