Your eyes will give you away – Sexual preferences can be revealed through eye dilation test

The famous eye-testing scene from the film 'Bladerunner'

The famous eye-testing scene from the film 'Bladerunner'

Now scientists can determine your sexual orientation through an infrared eye-tracking camera that measures your pupil dilations.

Researchers at Cornell University were able to identify the sexual orientation of men and women through testing the response of their eyes when watching pornographic material.

Dilation of the pupils is an unconscious sign of arousal, and one which researchers hope will be a less invasive – and less embarrassing – means of determining sexual orientation.
“The idea was to find an unconscious measure, …to find measures that were not so invasive, but reliable. …We wanted to really find a measure of sexuality that goes beyond what people tell us.”

The study assessed 325 men and women of various sexual orientations.

Men and women react differently to sexual stimulation: men are more influenced by erotic stimuli while women tend to be more influenced by other, nonsexual stimuli. And the report reveals that the eyes follow this tendency.

An infrared eye-tracking camera was used to measure eye dilation while the subjects watched erotic or non-erotic videos.
Heterosexual men and homosexual women predictably showed more eye dilation when shown sexual images of women. Homosexual men’s eyes responded to men.

The eyes of heterosexual women, however, responded to images of both sexes.
This did not mean women were generally bisexual. Rather, it represented an evolutionary difference in the way the eyes informed the brain.
“Their body is not connected to their mind, which is very different from guys,” he said.
Bisexual men produced similar dilation responses to heterosexual women.

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