Laser Vision Correction
Laser Vision Correction -- LASIK or PRK -- is simply using a laser to reshape the surface of the cornea to correct refractive error. Most people have some amount of refractive error, either near-sightedness, far-sightedness or astigmatism. The most common way that these refractive errors are corrected is by wearing glasses or contact lenses. Laser vision correction re-shapes the cornea to decrease the need for glasses or contacts.
What is the difference between LASIK and PRK?
The human cornea is made of several layers. The outer surface layer is called the epithelium. The thickest layer, which is in the middle, is called the stroma. Both LASIK and PRK involve using a laser to reshape the corneal stroma. The difference in the two procedures is how the laser is able to access the stroma. With LASIK (laser-assisted in situ keratomileusis), a flap is created of both the surface epithelium and the outermost portion of the stroma. This flap is gently elevated and folded to allow the VISX customvue laser to reshape the corneal stroma. After the surgery, the flap is replaced over the stromal bed, and it heals in place. In PRK (photorefractive keratectomy), the surface epithelium is removed with either a special rotating brush or with alcohol. After the epithelium is removed and the laser procedure is performed, a bandage contact lens is placed over the eye as the epithelium re-grows over the surface. With PRK, there is no flap.
Who is a good candidate for laser vision correction?
- A person who is interested in surgery to decrease their need for glasses or contacts and has realistic expectations about the goals of surgery
- 21 years old or older
- Stable glasses or contact prescription
- No vision-impairing or vision-threatening eye disease
- Degree of refractive error within the FDA-approved limits for LASIK or PRK.
- For women: not currently pregnant or nursing.
- Sufficient corneal thickness to perform the desired degree of correction.
- A regular corneal shape on corneal topography (topography is a "map" of the shape of the cornea)
How do I find out if I'm a good candidate?
If you--or a friend or family member--are interested in laser vision correction, please call 425-292-0716 or click here to schedule a free consultation for more information and an evaluation of whether you are an appropriate candidate for laser vision correction.