How Does the Eye Work?
Approximately 80 percent of everything we learn comes through our eyes – the question is, how?
The eye contains over two million working parts and is considered the second most complex organ in the body – the most complex is the brain.
The inner structures of the eye all work together to produce an image that your brain can understand.
In order to produce a clear image, the eyes must complete a five step process:
Step 1: Light enters the eye through the cornea
When we look at an object, the light that is reflected off of the object enters the eye through the clear front layer of the eye, called the cornea. The cornea bends the light before it passes through a watery substance that fills the area behind the cornea, called the aqueous humor.
Step 2: The pupil adjusts in response to the light
The light continues to travel through the black opening in the center of the iris, called the pupil. The iris is the colorful part of your eye that gives it its blue, green, hazel, brown or dark appearance.
The pupil then automatically gets bigger or smaller, depending on the intensity of the light.
How does the pupil expand and contract?
