Blincam wearable camera takes photos when you blink
From: Wareable - 06/27/2016

Blincam is building a blink operated wearable camera that clips onto any pair
of glasses.

Taking a blinking shot is done via a sensor that is able to detect eye
movement, which activates the camera shutter. The sensor is able to
distinguish between firm blinks and natural blinks to ensure you're not
firing off shots 24/7. Images can then be sent wirelessly to your phone or
saved to a microSD card. (available 08/2017 for about $200)

Read the entire article and view a video (2:11) at:
https://www.wareable.com/cameras/blincam-wearable-camera-takes-photos-when-you-blink-3017

Links:
Blincam
http://www.blincam.co

Makuake (in Japanese)
https://www.makuake.com/project/blincaminc

Wearable Lets You Take Photos with the Blink of an Eye (video 4:44)
http://engineeringupdate.ecnmag.com/detail/videos/engineering-update/video/5057063911001/engineering-update-171:-wearable-lets-you-take-photos-with-the-blink-of-an-eye