Laser Eye Surgery
Laser Eye Surgery Using Photorefractive Keratectomy
Photorefractive keratectomy (PRK) is a laser eye surgery procedure that is carried out with the key intent to correct a patients vision. PRK permanently adjusts the shape of the frontal corneal tissue using an excimer laser, which is a high-precision ultraviolet chemical laser. The outer layer of the cornea (epithelium) is removed, and then a tiny amount of the corneal tissue is burnt off wearing the laser. Such an ablation renders the preferred shape to the cornea and allows for superlative refraction.
PRK is a technologically advanced laser vision correction surgical procedure. For instance, a computer system drafts the eye position around 4,000 times per second, redirecting laser pulses for exact ablation. As covered above, the epithelium is removed prior to ablation. This does not cripple the patients vision, since the epithelium is a soft and regenerating layer, which is experienced of absolutely replacing itself within a matter of days. However, the deeper layers, once burnt off, will be left that way because they possess paltry regenerative capability. This concept is the essence of the Photorefractive keratectomy surgical procedure.
PRK contrasts from LASIK laser surgery in a way that the epithelium is removed in PRK and allowed to regenerate. On the other hand, LASIK doesn't involve epithelium removal. Instead it consists of cutting a flap in the cornea in order to make the appropriate incisions. Compared to LASIK, a patient who has undergone PRK haves more pain and recovery is slow. However, both procedures are similar in the respect that they make use of a laser.
Photorefractive keratectomy is a viable laser vision correction procedure, but it does have possible complications. Apart from slow recovery and pain, the patient may experience glares and halos. As in any refractive surgery, there is a possibility of over- or under-correction. Eye surgeons typically perform PRK on one eye at a time, in order to gauge the results of the procedure and ensure its efficacy.
In a majority of cases, PRK has proven to be a safe and efficacious laser eye surgery new york procedure to correct myopia. However, since the procedure is irreversible, it is recommended that the patient consults an eye doctor instead of jumping on a conclusive answer.
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