LASIK is a surgical procedure that uses a laser to correct nearsightedness, farsightedness, and/or astigmatism. In LASIK, a thin flap in the cornea is created. The surgeon folds back the flap, then removes some corneal tissue underneath using an excimer laser. The flap is then laid back in place, covering the area where the corneal tissue was removed. With nearsighted people, the goal of LASIK is to flatten the too-steep cornea; with farsighted people, a steeper cornea is desired. LASIK can also correct astigmatism by smoothing an irregular cornea into a more normal shape.
If you are considering LASIK eye surgery, your first step is to choose a
good LASIK surgeon who can evaluate whether LASIK is right for you. Your LASIK
surgeon will examine your eyes to determine their health, what kind of vision
correction you need, and how much laser ablation (corneal tissue removal) is
required. The doctor will also ask about any health conditions that may
disqualify you altogether for LASIK surgery.
The surgeon folds back the hinged flap to access the underlying cornea
(called the stroma) and removes some corneal tissue using an excimer laser. This
highly specialized laser uses a cool ultraviolet light beam to remove ("ablate")
microscopic amounts of tissue from the cornea to reshape it so it more
accurately focuses light on the retina for improved vision. For nearsighted
people, the goal is to flatten the cornea; with farsighted people, a steeper
cornea is desired. Excimer lasers also can correct astigmatism by smoothing an
irregular cornea into a more normal shape. It is a misconception that LASIK
cannot treat astigmatism.
Your eye doctor will perform a thorough eye exam to ensure your eyes are healthy enough for the procedure. He or she will evaluate: the shape and thickness of your cornea; pupil size; refractive errors (myopia, hyperopia and astigmatism); as well as any other eye conditions.
The Moistness of your eyes will also be evaluated, and a precautionary treatment may be recommended to reduce your risk of developing dry eyes after LASIK.
Usually, an automated instrument called a corneal topographer is used to measure the curvature of the front surface of your eye and create a "map" of your cornea.
With wavefront technology associated with custom LASIK, you also are likely to undergo a wavefront analysis that sends light waves through the eye to provide an even more precise map of aberrations affecting your vision.
Your eye doctor will also note your general health history and any medications you are taking to determine if you are a suitable candidate for LASIK.
You should stop wearing contact lenses for a period of time advised by your doctor (typically around two weeks) before your eye exam and before the LASIK procedure, as contacts can alter the natural shape of your cornea.
Before your surgery begins, numbing eye drops are applied to your eye to prevent any discomfort during the procedure. Your doctor may also give you some medication to help you relax. Your eye will be positioned under the laser, and an instrument called a lid speculum is used to keep your eyelids open. The surgeon uses an ink marker to mark the cornea before creating the flap. A suction ring is applied to the front of your eye to prevent eye movements or loss of contact that could affect flap quality. After the corneal flap is created, the surgeon then uses a computer to adjust the excimer laser for your particular prescription. You will be asked to look at a target light for a short time while he or she watches your eye through a microscope as the laser sends pulses of light to your cornea.
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“Very comfortable and clean, friendly staff. Thank you. All the staff and ‘trainees’ were excellent, thank you very much for making a potentially stressful time very bearable.”
“Relaxed atmosphere and friendliness of all staff and trainees. They were all brilliant.”
“Staff made me feel confident and relaxed about a procedure I was very apprehensive and nervous about. The outcome has been beyond my expectations. Thank you”
JOSHI EYE CARE |
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