There are plenty of decent wearable and action cameras around. The Blincam lets you capture shots with a wink though. This smart wearable device attaches to your pair of glasses and lets you capture what you are seeing. It is smart enough to distinguish between strong winks and natural blinks.
Blincam has Bluetooth, so you can download photos to your smartphone. The device also has a Micro USB port. The above video shows what you can do with it.