Ocular pneumoplethysmograph (OPG) tests were performed in 499 employees of an industrial firm. The ocular volume change (OVC), in microliters per cardiac cycle, was calculated from each of OPG tests. In the 195 females, the OVC was 294 +/- 81 microl. In the 304 males, the OVC was 269 +/- 86 microl. The female-male OVC difference was significant, p = 0.001.
Copyright 2002 S. Karger AG, Basel