Page 72 - Allah's Art of Detail

70 ALLAH'S ART OF DETAIL

The Perfect and Astonishing Details in the Human Eye

Even when you look at the pen in your hand for just a few sec-

onds, hundreds of billions of processes take place in your eye.
Light passes through its cornea and pupil and then the lens, where
light-sensitive cells convert it into electrical signals to be transmit-
ted to the nerve endings as impulses. The image reaching the reti-
na is reversed and upside down, and yet the brain can interpret it
and provide a normal image by collecting the separate images
from both eyes, identifying all of the object’s features, and combin-
ing the images from both eyes into a single picture. It also deter-
mines the object’s nature, color, and distance. The eyes do all of this
in as little as a tenth of a second.
The same processes take place in the brain whether you look
at a tiny dot or a large ship, and the resulting image forms in a 1
mm (0.0393 in) point. You can never be sure that the pen in your
hand is close to you or that a far-off ship is larger than a pencil, for

the size of the place where these images form is exactly the same.