A study from Cornell University suggests that a person’s sexual orientation can be measured by examining pupil dilation. It’s like the test that Harrison Ford used in Blade Runner to figure out that Sean Young was an android (not that there’s anything wrong with that).

http://www.latimes.com/news/science/sciencenow/la-sci-sn-sexual-orientation-eyes-20120806,0,4792049.story?track=lat-pick