How many of you are aware of the fact that the concept of camera is based exactly on the same principle of working as our eye. Our eye and a camera have a lot of similarities. Just like a camera has a lens, our eye also has a lens. In a camera, the light enters the camera lens, it gets refracted and then as we press the shutter, the film plane is exposed to the shutter and image is obtained on film or sensors. The human eye has the same structure and functioning.

Light enters the human eye through the lens. And just like a camera lens has aperture which controls the amount of light entering the camera, the human eye has a pupil which automatically opens in low light and closes when faced with severe light conditions. Unfortunately for most cameras, like the Lumix DMC TZ5, we have to actually manually adjust the aperture. As the light enters the eye, it bends on passing through the lens and forms an image on a plane which is called the Retina. In the human brain, the Retina performs the function of the film plane. Like the camera, our eye also has a shutter which opens and closes automatically, this is called the iris.

It is quite astonishing how a biological organ has the same mechanism and physical structure as a mechanical device. Another surprising similarity is that both the camera lens and eye lens form inverted images, but in the case of cameras that image is corrected through the use of a mirror, whereas a mechanism of the brain helps us to retain the correct image. Have you ever thought when using your camera, that there is not only one camera at work, but rather two, considering how your eye behaves just like a camera!