With sterile environments, like a surgical room, we are looking for a way to control a computer hands free.

Voice dictation works for some individuals with a learning curve, but our institution is looking for an alternative.

What hands free controls are offered by eye tracking? Headbox size?

How does it handle other sets of users nearby?

Does it work through splash guards and visors?

asked 23 Feb '15, 18:16

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phyatt ♦♦
accept rate: 8%

Eye tracking is a prime solution for use in a surgical room.

Input Options

Triggering by looking at on screen or off screen targets can be added. Blink clicking. Dwell clicking.

Eye tracking provides quick and intuitive pointing in applications. EyeTech's mouse control software, Quick Glance and QuickACCESS are great starting points. QuickACCESS especially can be customized to work with almost any Windows software to make common actions easily accomplished with the eye tracker.

Tracking through Visors or Splash Guards

One concern about eye tracking is if it will track through face shields and masks. As long as the visor or face shield is mainly free of scratches and doesn't have huge IR reflections from the camera, it should work fine.

Here is a simple test to see if the reflections cover up the eye:

  1. Place a camera a few feet from the user pointed at their face
  2. Place a light source a few inches offset from the camera, again pointed at the user.
  3. If the reflection off the visor covers up the eyes then
  4. the visor should be adjusted slightly up or down to move the reflection or
  5. a different visor may need to be used or
  6. an anti-reflective coating should be added to the visor

The limitations of a visor can be compared to the recommendations for usage with a pair of glasses.

Typically computer glasses are recommended for use with eye tracking on a desktop computer, though some people use it with progressive lenses. Bifocals, trifocals and hard contacts typically add too many artifacts around the pupil for reliable eye tracking.

Soft contacts, sun glasses and other glasses work well with eye tracking.

Large Headbox Size

At CES 2015, EyeTech demoed the first of its kind Multi-User Tracker demonstration. The setup had four cameras, with a head box 7 feet from the camera and a 40" screen. The headbox size was roughly 4 feet wide by 2 feet tall!

With the AEye technology, EyeTech can offer a unique solution for a large headbox area.

Instead of one or two eye tracking cameras that track a user across a several inches, instead an array of cameras can track across practically any headbox size, without a network of computers to control or access all of them. A single host can handle the input from all the eye trackers.

EyeTech in October 2014 did an internal demonstration of 20 eye trackers connected and tracking simultaneously on a single computer. And the limitation at 20 eye trackers was only from running out of powered USB ports in our office.

A single eye tracker has a headbox of roughly 1 foot high by 2 feet wide.

Tracking a Single User among Many

Right now a single eye tracker can pick up a single pair of eyes. With an eye tracking array of say 12 cameras you could possible have 12 sets of eyes tracked and providing input.

Selecting a single user out of N users and keeping track of that user across the camera array, mainly requires a little more software development to do the bookkeeping of who to track and who to ignore.

This feature can be added in software. A particular eye gesture could be used to gain the mouse control lock. Multiple sets of eyes can also be tracked for pointing and marking but without removing control from the main user.

For more information about getting this kind of setup going at your location please see our main website and contact Sales or Engineering.



answered 21 Apr '15, 19:50

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phyatt ♦♦
accept rate: 8%

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Asked: 23 Feb '15, 18:16

Seen: 2,727 times

Last updated: 21 Apr '15, 19:50

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