Update 23: Tips on positioning the sensor

Dear backers,

By now, all of you should have received your Vigos. We hope you’ve been enjoying using Vigo! For some backers, Vigo has been functioning fine while for other backers, there has been difficulty getting Vigo in the right position to pick up blinks correctly. In this update we’ll provide a few tips on how to position Vigo.

Vigo is out of place if:

1. You’re stuck on the page that says “Vigo is picking up your blinks”

2. The app tells you to recalibrate or readjust Vigo

3. You’re getting a reading of 0 on the app

4. The app is telling you you’re tired when you’re not

Please note that with #4, if Vigo is giving you inaccurate results it’s because Vigo isn’t in the right place, so it’s reading erroneous data and producing an inaccurate alertness score.

Here are a few tips to help you get Vigo into the right postion.

1. The sensor needs to see your eye. Think of the sensor as a little camera. If it’s too close to your eye, it won’t know which part of your eye it’s looking at. If it’s too far away from your eyes, it won’t be able to pick out your blink movements from your other facial information. If it’s pointing somewhere other than your eye, it will be looking at skin rather than seeing your blinks. The sensor needs to be parallel from your eyes, in a direct line of sight. The pictures below demonstrate incorrect and correct usage of Vigo (thanks for the backers who let us use their pictures!).


Incorrect: (Left) Vigo is too far away from the eyes. Needs to be closer to 1–2cm; the position of the sensor tip can be adjusted by adjusting the neck of Vigo. (Right) Vigo is too low. The sensor needs to reach up to the eye. In this picture the sensor is touching the skin underneath the eyes, so no blinks can be detected. Need to rotate Vigo up by about 2cm.


The sensor should be parallel to the eyes
The sensor should be in direct line of sight of the eye

2. Try using the blinking light as a guide to know where the sensor is looking at. The light should fall onto the white of your eye or your pupil, a position where the sensor is able to see your eyes and eyelid movement clearly. If it’s falling onto the skin around your eye, Vigo will not work.

Incorrect: The LED light needs to fall as close as possible onto the eye rather than the skin next to it.

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Correct: In this video the LED light is falling onto the white of the eye, which means the sensor is able to see the blink movements across that area.

For people with larger faces where the sensor light barely reaches the corner of the eye, try straightening out the neck of Vigo so that the sensor is looking at your eyes from the side. The sensor can still pick up blinks from the side just as a person standing next to you can see if you’re blinking from the side.

The sensor can pick up blinks from the side.

3. Don’t look down when calibrating with the app. When you’re driving or performing normal activities, you’re usually looking straight ahead. When looking at your phone, especially if it’s on your lap or on the desk in front of you, your eyelids drop, so the sensor could think your eyes are closed when they’re not. Instead, when calibrating, try holding up your phone so that you’re looking ahead with your eyes are fully open. The sensor is looking at the strength of the movements of your eyes — when your eyes are wide open each blink produces a large movement of your eyelids, whereas when you’re looking down the movement can become too small for the sensor to pick up.

Incorrect: Looking down at the phone when calibrating. The eyelids droop in this case which look like they are closed.
Correct: Hold up the phone so you’re looking straight ahead. Your eyes will be open to its full in this case.

4. Try using the iOS hack to see what Vigo is seeing. On the iOS app, if you tap the tomorrow button “>” on the blue bar below the Recalibrate button, you’ll bring up a secret screen of the raw data that Vigo is seeing. (This feature was originally for internal debugging purposes but we’re announcing it here to help backers adjust Vigo.) When you blink, you should see a sharp spike. If there are no spikes produced when you blink, that means the sensor is out of place.

Left: Incorrect positioning causes no blinks to be detected. Vigo may think you’re asleep. Right: Correct positioning produces noticeable spikes when blinking.

If you’re on Android, please send us an email to info@wearvigo.com identifying who you are on Kickstarter and we’ll provide you with a link to download a separate internal Android debugging app that contains these features.

5. Make sure the ear gel is securely in your ear. The ear gel that came with Vigo has an ergonomic design that should fit comfortably in your ear and add stability to Vigo, in addition to the ear grip that goes over your ear. The “tail” of the ear gel that protrudes should go into the helix of your ear.

When putting on Vigo, it is easier to put in the ear gel part first, then slipping the ear grip over your ear, so you can ensure the ear gel is in correctly, as previously demonstrated in this video below.

We hope these tips were helpful as you learn how to use Vigo! Please continue to share feedback and comments to help out other backers — some of these tips actually came from backers like yourself! (Kudos to Jacob Eichenbaum who found the trick with using the indicator light.) Thanks for being a proud backer of Vigo!

The Vigo Team

Originally published at www.kickstarter.com.

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