The Camera Versus the Human Eye

This article started after I followed an online discussion about whether a 35mm or a 50mm lens on a full frame camera gives the equivalent field of view to normal human vision. This particular discussion immediately delved into the optical physics of the eye as a camera and lens -- an understandable comparison since the eye consists of a front element (the cornea), an aperture ring (the iris and pupil), a lens, and a sensor (the retina).

Despite all the impressive mathematics thrown back and forth regarding the optical physics of the eyeball, the discussion didn’t quite seem to make sense logically, so I did a lot of reading of my own on the topic.

Iris: A Concept Camera That’s Controlled Using Your Eye

Using the human eye to control cameras isn't a new idea -- Canon used to offer eye-controlled focusing in its SLRs -- but designer Mimi Zou's Iris concept camera takes the concept one step further by having the camera be entirely controlled by the eye. Shaped like a lens, the photographer uses the camera by simply looking through it. Focusing, zooming, and snapping photos are done by looking, narrowing/widening the eyes, and blinking (respectively).

Image Sensor Implants Used as Makeshift Eyes for the Blind

Image sensors and the advent of digital imaging have been met with differing reactions from the photographical community. But what a team of doctors at the Oxford Eye Hospital have managed to do with the technology is 100% digital, and 100% amazing. Clinical trial leaders Robert MacLaren and Tim Jackson have helped two blind men to partially see again.