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so wouldn't it be useful if you could instantly know where people are looking
without having to stare back at them maybe you're wondering if your crush is
checking you out from across the room or maybe you're just hoping that no one can
see you picking your nose inside the car well we haven't invented 360 degree
bionic vision implants yet but there are a number of eye tracking technologies
out there that can at least help your computer know exactly what you're
looking at which has applications and feels from gaming to marketing to even
psychology but how exactly do they work well it turns out there are a number of
different ways to keep an eye on your eyeballs
and the modern history of eye tracking goes all the way back to 1908 when
psychologist edmund huey developed a contraption that looked like a contact
lens with the lens part attached to a needle that would measure where the eye
was pointed of course it wasn't exactly comfortable to have a gadget physically
touching the user's eyes so while we patiently waited for the cubs to win
another world series other inventors pushed the field forward
and funnily enough it was in chicago in 1937 that another method of eye tracking
was developed that involves shining light onto a subject's eyes and exposing
the reflections onto film to understand human reading patterns now obviously
modern eye tracking systems have dispensed with physical film but this
strategy of examining light that reflects off your eyes is key to how
consumer eye trackers work today you see eye trackers like toby which are
gaining popularity with pc gamers fire infrared light instead of visible light
at your eyes so the tracker will disturb your vision while you're in the heat of
battle now this light is usually shown in the specific pattern which lands on
your eye making it easier for the infrared camera built into the tracker
to keep tabs on changes in how the light is being reflected
so many times per second this camera will take infrared snapshots of the
patterns on your eyes and process these images to determine where you're looking
for gamers eye tracking is supported in quite a few popular games from indie
titles to big budget aaa releases and can be used for everything from looking
around the cockpit to determining where your targeting reticle will go in the
shoot em up game and the technology has also shown problems for players with
disabilities who might find traditional controllers difficult to use or even vr
gamers who want the more realistic experience of the headset display
adjusting to where their eyes are looking rather than just head movements
and as for outside the gaming world eye tracking has also been used across
disciplines to figure out what people are most interested in meaning it has
obvious applications for advertisers eye tracking tech has already been used in
studies that have revealed things about which elements of an advertisement or a
web page best hold a viewer's attention and what things might just be taking up
space or even turning the viewer off so this has raised concerns about how the
technology may be used in the near future for example if you look at the
digital display in the shopping mall containing an ad is there an infrared
camera watching your eye movements without your knowledge is it being logged somewhere will websites end up
being able to watch you through an eye tracker connected to your pc so that
they can cook up even sneakier ways to serve you ads but even though eye
tracking has plenty of applications in somewhat nefarious fields other areas
like medical research also stand to benefit from it tremendously so you
won't need a fancy eye or emitter and camera system to know that i'll be
keeping an eye on it
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