The Science behind Perfect Eyesight

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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.

 

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.

TEI Open for Eyecare, Telehealth Care
Starting May 11


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The Eye Institute is open starting Monday, May 11 for all eyecare, vision change, and medical eye care. Call now to schedule your annual eye exam.

Safety Protocols
The Eye Institute is dedicated to providing care to the public while keeping all patrons and employees safe and healthy. Please note that a facial mask or covering is required during your visit,and we are not able to provide patients with masks. Please read more in our safety protocols.

Telehealth Appointments
If you’d prefer to remain at home, we are offering telehealth appointments via a HIPAA-compliant platform. Telehealth is only available for some types of appointments. We will use your medical insurance for this visit and bill it as a “specialist office visit.” No insurance? No problem. We have standard rates for telehealth appointments for you. Call your preferred location to set up a telehealth appointment.

We also continue to serve you in the following ways:

We look forward to serving you, and please reach out to us if you need us. We’re just a phone call away!

Knightdale: 919-266-2048
North Raleigh:  919-977-0303
Downtown Raleigh: 919-200-4840

The Eye Institute

Good Looks is now The Eye Institute.

Thank you for visiting GoodLooks. We’re now part of The Eye Institute family. You can still visit us in the same North Raleigh location or check out one of our other two offices in Raleigh or Knightdale. Learn more on the “Locations” page on our website.

We look forward to seeing you again soon!