Here’s a quick and simple tip for better portraits by Reddit user rmx_:
Everyone has a lazy eye. By that, I mean one eye is always smaller and/or more closed than the other eye. In some people, it is very easy to spot; in others, nearly impossible. The “beautiful people” have more symmetrical faces, but still, one eye will open more than the other. (Denzel Washington has one of the most I have seen [...])
[...] here is the tip: get the smaller/lazier eye slightly closer to the camera. Oh, and don’t tell the person what you’re looking at their eyes for! You’ll make them self conscious. Simply ask them to look at your finger and move their head to follow it, and then guide them left or right as necessary. Chances are, the movement needed will not be so much that you have to adjust your lights.
Here’s a slow motion video showing a closeup look at the human eye, our amazing biological lens (and sensor). You might be surprised at how mechanical its movements are and how fluid the iris is. Another crazy fact is that we’re continually relying on “image stabilization” to see things clearly:
The visual system in the brain is too slow to process information if the images are slipping across the retina at more than a few degrees per second. Thus, for humans to be able to see while moving, the brain must compensate for the motion of the head by turning the eyes. [#]
To see a quick demonstration of this fact, try the following experiment: hold your hand up, about one foot in front of your nose. Keep your head still, and shake your hand from side to side, slowly at first, and then faster and faster. At first you will be able to see your fingers quite clearly. But as the frequency of shaking passes about 1 Hz, the fingers will become a blur. Now, keep your hand still, and shake your head. No matter how fast you shake your head, the image of your fingers remains clear. This demonstrates that the brain can move the eyes opposite to head motion much better than it can follow, or pursue, a hand movement. When your pursuit system fails to keep up with the moving hand, images slip on the retina and you see a blurred hand. [#]
Like with cameras, our built-in image stabilization can deal with head shake but not motion blur.
You might want to skip this post if you’re squeamish. A filmmaker named Rob Spence has successfully become a cyborg by replacing an eye he lost through a childhood accident with a wireless camera that transmits everything he sees to a computer. Spence believes that technology may soon reach the point where are be tempted to swap out their body parts for superior prosthetics. No word on when he’ll be able to apply Instagram filters to his eye camera photos.
San Franciscan Tanya Vlach lost her left eye in a car accident back in 2005. Dissatisfied with her prosthetic eye, she’s trying to raise money to develop an in-eye camera that captures blink-activated still photos and 720p HD video. Her wish list of features include geotagging, IR/UV capture, facial recognition, and sensor activated zoom, focus, and on/off. Vlach’s Kickstarter project is titled “Grow a new eye“, and has a set goal of reaching $15,000 in funding by August 3rd, 2011.