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Understanding How Your Eyes Work

Last updated 6 years ago

Henry David Thoreau once said, “The eye is the jewel of the body.” As complex and valuable as the eyes are, people sometimes take their eyes for granted because they don’t understand how they work. Read on to learn how the parts of the eye work together to create vision:

First, light rays reflect off an object and enter the cornea—the transparent outer covering of the eye—which refracts the light that passes through the pupil. The iris, the colored area around the pupil, opens and closes in order to regulate the amount of light passing through.

The light rays then pass through the lens of the eye, which further focuses them, before being projected onto the retina’s photoreceptors at the back of the eye. The retina, a thin layer of tissue, consists of millions of very small light-sensing nerve cells, named rods and cones for their recognizable shapes. Cones are located in the macula, the center of the retina, and serve to provide clear vision and detect colors and details in bright light. Rods are located outside the macula and provide peripheral vision as well as helping you see in low light and at night.

The cones and rods convert the refracted light rays into electrical impulses, which converge on the optic nerve, travel to the brain, and transform into a recognizable picture.

Now that you understand how your eyes work, it may be time to get them checked out! For a top-quality eye care experience, call Wize Eyes at (516) 358-0040. We provide thorough eye exams seven days a week as well as 30-minute same-day service for eyeglass prescriptions. Visit one of our six locations on Long Island—Hicksville, New Hyde Park, Melville, East Meadow, Westbury, Massapequa, or Smithtown.


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