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The Science behind Perfect Eyesight

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The "Eyes" Have It

Understanding the principle behind how the eyes work can help patients select the best course of corrective action for their needs. Whether the goal is simple, non-invasive correction or a permanent fix, an experienced optometrist will evaluate your eyes and eyesight, then recommend the best options for your lifestyle.

To learn more about how your eyes work, current vision problems that you're experiencing, or potential vision solutions, make an appointment with your optometrist today.

It's easy to take vision for granted when the eyes perform flawlessly. However, when eye problems crop up, it's hard not to wonder how the eyes work. In a properly functioning eye, a number of elements must cooperate perfectly to create good vision; just one malfunctioning factor in this instantaneous process can cause blurry vision, pain or even blindness. The entire field of optometry is dedicated to managing vision problems and determining the best method of correcting poor vision.

The Birth of a Picture

Vision begins when light rays are reflected off objects and into the eyes via the cornea, a transparent bulge that covers the front of the eyeball. The cornea refracts, or bends, the light rays so that they pass through the dark, small round hole, called the pupil. The amount of light permitted to enter the pupil is regulated by the iris, the colored part of the eye that changes the size of the iris.

After passing through the pupil, the light rays shine through the lens. This remarkable component changes it shape to bend the rays as needed to focus them on the retina located at the back of the eyeball.

Translating the Picture

The retina is composed of millions of two types of nerve cells that detect the light. Cones are found primarily in the center of the retina, in a region called the macula, and specialize in sharp vision with fine details and colors. Rods reside beyond the macula to provide peripheral (side) vision, detect motion outside the central vision, and provide vision in dim or dark lighting conditions.

Decoding the Message

Both cones and rods convert the received light rays into specific patterns of electrical impulses to be delivered to the brain through the optic nerve. In the brain, the impulses are assembled and decoded to form an image.

When Things Don’t Line Up

The overall shape of the eyeball ultimately determines how well the eye can focus and receive the incoming image; when a patient experiences poor or blurry vision, an optometrist exams the eye to figure out what went wrong.

Normally, the eye retains a spherical shape. If the shape changes, such as with an elongated eyeball, the cornea's curvature will no longer focus the incoming light rays appropriately to match the distance from the lens to the retina.

Consultation with an optometrist can determine whether corrective lenses or surgery are needed to restore properly focused vision.

Sources:

American Optometric Association (2013). How Your Eyes Work.


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Testimonial

Great service! Dr Gertsberger is wonderful. He takes care of my whole family and we have all been pleased with our eye care.

SylnJoey R.
Garden City, KS
 

Dr. Michael Houseman took great care of my 92-year-old father, who can't hear very well at all, and who gets confused easily. He was very patient and kind, and spent extra time giving him the best prescription possible. When we went to get glasses, they were able to cut the lenses in house, very affordably.

Mark Berg
 

AMAZING customer service! The doctor and staff were incredible to work with and really care about their patients. They explained everything and were extremely helpful!

Samantha Roecker
 

Great Drs. and friendly staff.

Cheryl Messenger
 

What fan can I say? If you need prompt, professional eye care, Garden City Optometrists is where you need to go for the best eye care in Southwest Kansas...they'll keep an eye out for you. (:-) Art Gomez, Scott City, Kansas

Art Gomez
 

This place has been in operation for more than 100 years, so they must be doing something right. That "something" is prompt, professional service. I've never had to wait long for an appointment or to be seen once I arrive at the office. The staff knows what they're doing, and I've never walked away unhappy.

Ashley F
 

I was shopping for my third set of glasses from Garden City Optometrists. The entire staff got in on the experience, showing me frames that they thought would work well for me. We didn't find exactly what I was looking for, so they ordered some more examples. I've had nothing but great experiences with all of the doctors and staff here. See you guys in a few days for my new frames!

Sean Collins

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