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Posted by on Apr 29, 2016 in TellMeWhy |

How Do I See?

How Do I See?

How Do I See? You see with your eyes, but also with your brain. There are many different parts of the eye that help to create vision. First, waves of light strike objects around you and are reflected back to your eyes.

Light passes through the cornea, the clear, dome-shaped surface that covers the front of the eye. The cornea bends – or refracts – this incoming light.

The iris, the colored part of the eye, regulates the size of the pupil, the opening that controls the amount of light that enters the eye. The light passes through the pupil.

Behind the pupil is a lens, a clear part of the eye that further focuses light, or an image. The lens focuses an upside-down picture on a screen that lines the back of the eye, called the retina.

The retina consists of special nerve cells that are sensitive to light. When light strikes these cells, they send a “picture message” to the visual center of the brain. Your brain interprets the message into a right-side-up picture and you see!

So you “see” with your brains; your eyes collect visual information to begin this complex process.

Content for this question contributed by Jackie Roberto, resident of Sewickley, Allegheny County, Pennsylvania, USA