How the Eye Works

How do your eyes work?

There are many different parts of the eye that help to create vision. We “see” with our brains; our eyes collect visual information and begin this complex process.

  • 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
  • Behind the pupil is the lens, a clear part of the eye that further focuses light, or an image, onto the retina
  • The retina is a thin, delicate, photosensitive tissue that contains the special “photoreceptor” cells that convert light into electrical signals
  • These electrical signals are processed further, and then travel from the retina of the eye to the brain through the optic nerve, a bundle of about one million nerve fibers

Courtesy National Eye Institute

How can you keep your eyes healthy?

Incorporate your eye health as part of your regular health check-ups. Having a comprehensive dilated eye exam is one of the best things you can do to make sure that you’re seeing the best you can and that you’re keeping your eyes healthy.

Millions of people have problems with their vision every year. Some of these problems can cause permanent vision loss and even blindness, while others are common problems that can be easily corrected with glasses or contact lenses.

Click here to know more about Eye Anatomy.