(SOURCE: Cornell University, news release, August 6, 2012)
MONDAY, Aug. 6 (HealthDay News) -- Clues to a person's sexual
orientation may lie in their eyes, a new study shows.
Researchers from Cornell University note that when people look
at someone they find attractive, their pupils dilate, or widen.
In their experiments, the team measured the size of people's
pupils with a specialized infrared lens as they watched erotic
videos, and these measurements predicted whether the person was
homosexual, heterosexual or somewhere in between. Measuring
pupil dilation, "will give us a much better understanding how
sexuality is expressed across the planet," study lead author
Gerulf Rieger, a research fellow at Cornell, said in a
university news release. He explained that researchers looking
into human sexual responses and orientation have long sought a
less invasive tool than the genital-arousal measurements
typically used in this type of research. Rieger reasoned that
pupil dilation might be such a tool. In the new stu