Lasik Versus Prk Eye Surgery
By R Heavner
LASIK (laser assisted in-situ keratomileusis ) is probably the most commonly performed laser eye surgery procedure and tends to be what people think of when considering laser surgery for vision correction. However not all patients may be ideal candidates for surgery due to variations in cornea thickness and curvature. Photo refractive keratectomy ,or PRK, may be the better option for vision correction in some patients who are not able to have LASIK.

Prior to the introduction and subsequent popularity of LASIK, PRK was the most common refractive eye surgery procedure performed. Both and PRK share similarities in that an excimer laser is utilized to sculpt and reshape the cornea of the eye in accordance with the patients medical needs. Both techniques are used in the correction of myopia (nearsightedness), hyperopia (farsightedness), astigmatism (blurred vision resulting from corneal irregularity), or a combination thereof. Likewise, both are outpatient surgical

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procedures which may be performed in a physicians office or clinic setting. There are however a few differences in the two procedures.

In a procedure a small flap is cut with a special tool on the exterior of the cornea. The computer controlled excimer laser is then used to reshape the corneal tissue under the flap. The flap is then replaced over the cornea where it will adhere to the eye and serve to protect it. In PRK, the excimer laser is used to remove tissue and reshape the cornea directly on the surface, or epithelial layer, of the eye. A protective soft contact lens is usually placed over the eye for 3-5 days to allow the epithelial surface to heal.

Several major differences for the patient exist in the two procedures. The first is the recovery period, which tends to be considerable shorter for patients as opposed to PRK. Likewise, vision improvement with PRK tends to be more of a gradual process than take from a few days to a few months. patients will in most circumstances experience the benefits of their surgery in a much shorter frame.

A successful end result for both procedures is an improvement in vision, and the correction of pre-existing vision conditions. Only a thorough examination and consultation with a qualified laser eye surgeon can determine which is right for you.

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