Page 95 - Miracle in the Eye

HARUN YAHYA

using a method that no technology can copy. Surrounding muscles lo-
cated within the eye can stretch or squeeze the lens and focus images on
the retina without interruption. Thanks to its flexible structure, the lens
changes its shape, ensuring that light constantly falls on the same spot on
the retina.
If the lens couldn't adjust by itself, we'd have to find some other means
to focus in on objects. This would require manual effort and great inconve-
nience on our part, since our vision would often remain foggy before we
could complete the focusing process. Simply looking at an object would
take time, slowing down our lives considerably.
But when we do want to focus in on an object at a certain distance, we
need not make any measurements or optical calculations. To see, all we
need to do is look. Everything else is done for us by the eye and the brain,
automatically. What's more, it takes place in a fraction of a second.

Light Adjustment
Photographs taken during the day generally come out clear. At night,
however, a photograph taken with same film and camera tends to be ex-
tremely dark. But when we open our eyelids for even a fraction of a second,
we can still see the stars, because, thanks to muscles around the pupil, the
eye can adjust itself to differing levels of brightness. Under dark conditions,
the pupil expands to admit more light. Similarly, in bright surroundings,
the pupil contracts to allow less light inside the eye. This way, vision be-
comes clear as possible, both night and day.

A Window Opening to a World of Color
The human eye "photographs" its images in both black-and-white
and in color. These images are then synthesized by the brain into the
sights we see.
For example, when we look at a particular object, it is our rod cells that
determine its shape. However, these cells can produce only an image in
tones of gray; so an extra set of cells, the cones, are needed to determine the

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