Cornea Information

Surgery to reduce/eliminate the need for glasses or contact lenses is called Refractive Surgery. Understanding how your eye focuses shows you how surgery can help.

There are two focusing elements in your eye:  the cornea and the lens. The cornea is the front clear wall that you see through. The lens is inside your eye and works to adjust your focus like the lens inside a camera. Refractive surgery can improve the focusing power of either of these to reduce or eliminate your need to use glasses or contact lenses.

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Fixing the Cornea: LASIK Eye Surgery, PRK, and SMILE

Your cornea focuses your eye by virtue of its shape. If surgery makes the shape of your cornea steeper or flatter it can make it focus stronger or weaker. Astigmatism is where your cornea has an oval shape instead of being round. Surgery can fix astigmatism by making the shape of your cornea round. We use lasers that can remove corneal tissue to fix the shape. This is how LASIK, PRK, SMILE and many other types of surgery can fix your focus.

Surgery that changes the shape of your cornea can be very fast, safe and accurate, but has some limitations. Your cornea is a structural wall of your eye, so it must be strong and stable to keep your eye healthy. Most corneal refractive surgery removes tissue from your cornea to fix the focus. That means you need to have enough corneal tissue after the surgical removal to keep your cornea healthy. If your cornea is too thin, or shows signs of being too elastic to hold its shape after surgery, you may not be a good candidate for corneal refractive surgery. Also, laser corneal surgery can only put your eye in focus for a single distance. It’s your natural lens that changes the focus from far to near when you are younger than the 40’s. After a certain age, the laser surgery won’t give you a full range of focus, and you may need reading glasses. The first critical step to determine if corneal refractive surgery is right for you, it to get a complete eye examination with sophisticated instruments that precisely measure your cornea and the focus of your eye. At SureVision Eye Centers, our corneal refractive surgery specialists can make that determination and explain the options for giving you a lifetime of the best possible vision.

Correcting the Lens

The other focusing element of your eye is the lens. This is located inside the front of your eye, behind the cornea. The lens is suspended by fibers attached to a muscle that can squeeze it, or stretch it, to change the focusing power of your eye. If this does not focus your eye properly it can produce the Dysfunctional Lens Syndrome. If your lens gets cloudy with age of disease, it is called a Cataract. Refractive Lens Surgery can correct these problems and works in two ways. One way is to add an additional lens that works with your natural lens to give you more focusing power. This is called an ICL (implanted contact lens) or Phakic Lens Implant. This adds extra focusing strength to your eye and preserves your natural ability to change focus for distance and reading. It is particularly helpful in people with too much nearsightedness or too thin a cornea for laser refractive surgery.

The second way is to remove your natural lens and replace it with an artificial lens (Lens Implant) that can put your eye into focus. This is certainly how we fix cataract problems, but can also be done for the Dysfunctional Lens Syndrome. Since the lens implant is artificial, we can use whatever lens is available to give you good focus. These come in a wide range that can correct nearsightedness, farsightedness, and astigmatism. They also come in a style that can give you range of focus for both near, far, and inbetween vision.

Years of Experience

At SureVision Eye Centers, our lens surgery specialists have decades of experience performing these procedures, and we offer the most sophisticated instruments to accurately measure and evaluate your eyes for refractive lens surgery. Your first step is to come in for an evaluation to find out if this is right for your eyes.

At SureVision Eye Centers,
Vision Like You’ve Never Seen Before™

The surgeons and doctors at SureVision Eye Centers are among the most experienced and well-trained in the world. Each year, they perform thousands of surgical and vision correction procedures. At SureVision Eye Centers, we believe everyone should have a lifetime of their best possible vision.

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