CHOC Children's
EYE CARE

Normal Vision

Illustration demonstrating normal vision
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What is the normal visual pathway?

  1. Light enters the eye through, and is bent by, the cornea, the clear, dome-shaped surface that covers the front of the eye.
  2. From the cornea, the light passes through the pupil. The iris, or the colored part of your eye, regulates the aperture, or size, of the pupil.
  3. From there, light passes through, and is further bent, by the lens (the transparent structure inside the eye that focuses light rays onto the retina).
  4. Next, it passes through the vitreous humor, the clear, jelly-like substance that fills the center of the eye and helps to keep the eye round in shape.
  5. Finally, the light reaches the retina, the light-sensitive nerve layer that lines the back of the eye.
  6. The optic nerve is then responsible for carrying the signals to the area of the brain (the visual cortex) which assembles the signals into images (i.e., our vision).

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