Mad Dog Kenrod asks: "A recent ad campaign for a digital camera had the slogan (something like) 'imagine being able to take a picture from your head and show it to people' - it was basically showcasing how small the camera was. This got me thinking: most people simply want to 'snap what they see'. Given that the human eye already has a very workable lens, and a retina which (I assume) is similar in technology to a digital camera, how feasible would it be to 'tap into' the optic nerve (not the brain, because by then the 'image' is probably something else entirely) and turn the signals from all those rods and cones into pixels?"
"Given we can do C.A.T. scans, would it even be feasible to do this from outside the head (say, with sufficient miniaturization, from the arm of your glasses)?
Of course, you would lack other things like zooms and filters and even an ability to 'frame' the picture (and there'd be problems for people with eye disease), but I propose that, for the majority of us who just want to quickly 'snap what we see' this would make for the smallest, lightest camera possible.
I know nothing about what would be involved in making this happen, so would be interested in people's thoughts."