Photorefractive keratectomy (PRK) is a laser eye surgery procedure that is performed to correct the key intent of a patient vision. PRK permanently the shape of the frontal corneal tissue changes with an discount coach handbags excimer laser, which is a high precision ultraviolet chemical laser. The outer layer of the cornea (epithelium) is removed, and then a small amount of clearance coach purses corneal tissue with the laser device burned. Such ablation makes the desired shape of the cornea and provides optimal light refraction.
nike factory outlet PRK is a technologically advanced surgical procedure. For example, a computer system monitored the eye position about 4,000 times per second, redirecting laser pulses for precise ablation. As mentioned above, the epithelium is removed before ablation. This does not interfere with the patients vision, since the epithelium is a coach outlet purses soft and regenerating layer completely replace in a position within a matter of days. However, the deeper layers, once burned, stay that way, because they have limited ability to regenerate. This theory is the cornerstone of photorefractive coach tote bags outlet keratectomy surgery.
PRK differs from LASIK in a way that the epithelium in PRK is removed and allowed to regenerate. On the other hand, it is coach outlet store online shoes not with LASIK epithelium removal. Instead, consists of cutting a flap in the cornea to make the desired cuts. Compared to LASIK, a patient who underwent PRK experiences more pain and recovery is slow. However, both procedures in respects similar that they make coach handbags wholesale use of a laser.
photorefractive keratectomy is a viable approach, but it has potential complications. Apart from slow recovery and pain, the patient stares and halos. As in any refractive surgery, there is coach wallets outlet a possibility of over-or correction. Ophthalmic surgeons typically perform PRK on one eye at a time, to measure the results of the procedure, and to ensure its effectiveness.
In the majority of cases, PRK has proven to be safe and effective procedure to correct myopia. coach outlet store online shoes However, since the process is irreversible, it is recommended that the patient consulted an ophthalmologist instead of jumping to a conclusion.
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