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Comprehensive Eye Care

The Physiology of Your Eyes

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Key Points

  • Many vision problems come from the eye’s inability to properly focus light onto the retina (for instance, nearsightedness, farsightedness, astigmatism).
  • The shape of your cornea, the power of your lens, and the length of your eye all work together — when they’re mismatched you may need corrective care.
  • Tylock Nasser Vision specializes for the condition known as “dry eye,” offering advanced diagnostics and treatments like the LipiFlow® system.
  • You’re encouraged to schedule a comprehensive eye exam because these underlying conditions may be caught early—before they significantly affect your vision.
  • Tylock Nasser Vision offers comprehensive eye exams to qualifying candidates in the Dallas–Fort Worth area, and provides contact information (Irving & McKinney locations) for scheduling a consultation.

Your eyes are the windows to the world. They allow you to see and interpret the shapes, colors, and dimensions of objects by processing the light they reflect. Like a camera, your eyes use light to form images. In a camera, light passes through a lens back onto the film. The cornea (outer layer of your eye) and lens inside your eye are similar to a camera’s lens system. Your pupil, located at the center of the iris (colored portion of the eye) acts like the shutter of a camera to control the amount of light that enters. The retina is located at the back of your eye and is similar to the camera’s film. In the normal eye, light rays pass through the cornea and lens and are focused directly on the retina to produce a clear image. The retina then sends the image to the brain. The eye’s complex optical components receive, focus, and process light into nerve impulses, which are sent to the brain – that is how we “see.”

Refractive Errors

The most common vision problem is the eye’s inability to focus incoming light onto the retina, causing blurred vision. This is caused by the way your eye refracts or bends light and focuses the light rays. The shape of the cornea, the power of the lens inside the eye, and the length of the eye together determine how rays of light are focused on the retina, the membrane that lines the back wall of the eye. These three components must be well matched for the eye to see clearly without correction. If the cornea is too steeply curved, then nearsightedness results. If the cornea is too flat, then farsightedness results. When the cornea has a shape similar to a football astigmatism results.

Chart illustrating how light affects an eye with different conditions

For the vision of your dreams, make a clear choice: Tylock Nasser Vision & Laser Center. Please call or email us for a LASIK evaluation or attend our complimentary LASIK Seminar held on Tuesdays at 6:00pm at our office. If you would like more information on LASIK or LASIK vision correction in general, please fill out a short form and we will get you this information as soon as possible.

Contact one of our patient directors in the Dallas, Fort Worth area today to schedule a complete eye examination.

New Name, Same Trusted Care!

Tylock George Eye Care is now Tylock Nasser Vision!

Our name and look are evolving, but the heart of our care remains beautifully unchanged. For decades, our patients and community have trusted us for exceptional clinical expertise, personalized attention, and a genuine commitment to life-changing outcomes.

That foundation continues.

The distinguished physicians and dedicated team you know and trust are here — providing the elevated, compassionate care you expect and deserve.